Are you going to be doing woodsball or arena/speedball type stuff? For woodsball I recommend the Tippman A5 - all mechanical - solid, reliable, and accurate. Plenty of upgrades available as well. I dislike the electronic triggers for outdoors play - they aren't as reliable and are susceptible to moisture. It starts to rain, and everybody with an electronic trigger runs for their cars, while everyone with manual guns runs for the woods. :rick:
Sports Authority carries good stuff around here, I got my A-5, 12oz tank, and mask in a kit for like $250 after I found a 25% off coupon floating around on the net.