I Have used pirana's , all of the brass eagle line, and most of the tippmann line as well as some spyders.
I curently use the Tippmann modle 98 custom with the flatline and responsive trigger upgrades.
I recomend the flatline and responsive triger and if you arent poor by the time you have these additions then you may as well get a nitro kit as well.
It is the only gun i have used that can fire so very far and go straight. It goes about 250 feet with out having to lob the balls. Also a very accurate gun, even with out the upgrades. I can shoot people through a crack in a wall of tires.
I can only say the bad thing about this gun is the price, and the additional costs of the upgrades.
In conlusion i would say that it is not the most pretty gun. It does not come with lots of little air tubs and neet buttons like the auto cockers, or the spyders, but then again you dont have to worky as much about droping it to hard.
A very good gun. Worth my wile to write a review.