Hopper is all you need, but if you use atypical paint, a barrel kit might help.
New regulator, but only if stock one breaks (heard rumors, mine's awesome!)
New T-board if you want even faster (you sicko, you wanna fire more than 20BPS?) or if your stock board messes up (again, all rumors, my stock rocks my socks.)
-Speed, reliability, accuracy, cheap (pick 4)
-None for me
-Many rumored problems I have not had
I just went to the field with my Wrath for the first time and I can now confidently say, this marker is truly incredible. Let me just say I went ahead and did the trigger job that gives the gun a 'backstop.' I did this for 2 reasons. 1st, I just plain wanted to shoot faster, and 2nd, I had had the problem with the switch sticking. It seemed like the switch would stick no matter what I did, but after wiggling some wires or adjusting the trigger out it would usually fix itself.
Anyways, I got out to the field after getting that and a few other things (oiling, O-rings, and disassembly) done. I had heard all the crap about the regulators screwing up so I took the precautions you guys suggested. I screwed my HPR adjustment screw out really far. At first I was worried because my gun wouldn't fire, but I realized I had busted my HPA's tank's O-ring as I screwed it in (how often does that happen?) Anyways, I approached the chrono. It took me a little while to learn the gun, but I got it shooting about 280 +/- 20 at 200 psi and with the LPR screwed in pretty far. With this done, I took all my paint out, took apart my gun, installed my ‹ber ghetto jumper (a very small screw that just barely fits between the prongs), and let rip at full auto, in order to break in the regulator. I was somewhat disappointed here though. While the gun could click at 20 BPS with just the solenoid, the regulator wasn't recharging fast enough to get me past a consistent 17 BPS. Any faster than that and the gun wouldn't fully cycle. A new regulator and maybe a new valve should fix this problem. With my trigger adjusted like it was, I found it very easy to walk and I don't really think I'll need a T-board.
Finally, after about 5000 shots (2 air tank fills + what I had left over from the last time I had played) at 17 BPS, I felt my regulator was probably broken in. I went ahead and refilled my air, added paint, and switched my gun back to semi-auto. Now was the big chrono test. I found my first shot went only 182, which I thought was awful and I was worried my gun might be broken, but then my next shot was right at 285. That's a pretty good sign right? Yes, this gun did have FSDO, but after that it fired at 285, 283, 281,284, 286. I went ahead and took all this down on paper because I knew I was gonna do a review.
The next thing I did was test the accuracy. I went out to a field the refs had been working on that wasn't in use, and fired as fast I could at a target that was really far away. It hit a bunker that was easily 100 feet away about 75% of the time. My previous gun wouldn't have had a chance at hitting this, but my paint just happened to be the exact bore of my barrel, and this thing was straight-up shooting darts. Unfortunately, my hopper wasn't doing this gun justice. I had read a review on Warpig that said the Reloader 2 would get a consistent 14 BPS. Either Warpig was wrong for the first time I have heard of, or I was firing faster than I thought I could, because my hopper just couldn't keep up. It felt like it was only feeding at about 11 or 12 BPS. I later borrowed a friend's Evolution 2, but it still wouldn't keep up with my fingers. Nobody would let me borrow a Halo, so I still dont' know how fast this thing could fire, but I guarantee you it will fire at least 16 BPS, and maybe more like 17.
Because of my eyes, I chopped 0 balls in the ~2000 rounds I shot. My barrel and bolt because of no breaks, and as a result, my accuracy improved immensely. I found the eyes performed great, but I never really had a chance to test them at high-speeds, only at lower, more erratic-feeding speeds, which most people consider to be a better test of eye ability. Oh, and did I mention this paint was jet black? Yes, several tourney players were pissed off, including Mr. Shocker, who had bouncebeam eyes, and I just couldn't help but laugh at these guys who didn't have breakbeam eyes and got so upset by the color of their paint!
Finally, (after several hours however, because I had to help like 50 new people) I managed to get some game time in. I'm not the best player out there, but with new muppet-mower I felt more confident that I could play and win. I did very well, taking out many people on the break with good laning (I took out 2 in one game with one lane, a first for me!). I did very well overall, and some guy with a Nasty Shocker came over and chatted with me for a while about my gun and he was freaking out and didn't believe it only cost me $250 (I got a great price a local shop). This impressed me a lot, because he had put more than $800 into his gun, and he was shocked that anyone sold such a great gun with so many features stock for under $400. This gun breaks the "Pick 2: Accuracy, Speed, Cheap" rule. The only minus I had for this gun was that in round I got shot in the feedneck and got paint all over it and in it. The very next round, my hopper came off when I made a dive for a bunker and I got shot while reaching for it. I suppose the paint acted as a lubricant to make my hopper fall out. Anyways, after getting shot in the feedneck and getting tons of splatter all over my gun, I had the Herculean task of taking my new beast home and cleaning it up. Sounds like a nightmare right? Wrong.
When I got home I looked at my gun. It was covered with splatter and had pink all down the cracks of the feedneck. However, the inside was immaculate, so I just took out the bolt, eyes, and ram. The ram cover thing had splatter on it. I used a damp cloth to clean off the trigger frame and I was careful not to get the board wet. I took everything else off the body and just washed that and my barrel, feedneck/clamp, and ram cover, and my gun was back to being immaculate again.
The only upgrade I can recommend is a new feedneck, because I just plain out don't think it holds hard enough when its got paint all in it, but then again what feedneck does? Also, depending on the typical size of the paint, you may not need a new barrel kit, but if your field carries unusual paint, go ahead and get one. The regulator also worked great for me.
This is easily one of the best guns I have ever owned, and I'm so impressed by it that I think I'm going to encourage all my friends to buy one. I found it to be faster, more reliable, and far more accurate than any Ion I have ever fired, and at my field, there are plenty of them and everyone wants me to try theirs. It was also cool knowing that I was the only guy out there with a Wrath.