Thanks for the help everyone. It looks like timmy's,impulses, imtimidator's, and matrixes are all great guns for the price range. Time to start researching!
btw, a few of you are wondering why i'd want a full-auto gun. I'm more of a recreational player than tourn. one, and i don't play at fields that often. there's this HUGE (1-2 square mile) hilly area by my house where me and the guys play little scenerios. However, there is a lack of cover there, so sometimes shear brute force (firing a payload of bullets at the enemy) beats out strategy. My tippman is a grea semi, but it just can't keep up sometimes.