I'm assuming that you need everything (tank, hopper, mask, gun), so if I were you I'd look at getting a Tippmann 98 Custom package. Another possibility is some kind of spyder package. The Tippmann is not much for looks, but it will not brake, it's VERY durable. The spyder is gunna look better, and you shoudn't have many problems with it, and chances are it will just be an O-ring or something small if there is a problem. You may also want to get a better mask then just the mask that comes with the package. A mask that I would look at in this case is a V-Force Shield, about $40, but it is a good thermal (won't fog) mask.
Tippmann Package:
http://xpaintball.com/tipmod98pain.html
Spyder Package #1:
http://xpaintball.com/spvisukit.html
Spyder Package #2:
http://xpaintball.com/sptldepa.html
Spyder Package #3:
http://xpaintball.com/spydimdelpac.html
Pirahna (like spyder) #1:
http://xpaintball.com/piegti1.html
Pirahna #2:
http://xpaintball.com/piranhagti1.html
These should give you an idea of what to look at. You can find other packages on Xpaintball.com , and also look around on other sites, but xpaintball is the only site that we can post.