98s are the way to go mate, theres only 3 real probs with them:
sear trigger: gun keeps machien gunning when a full gas tank is screwed in
o-ring: the bolt goes forward and stays there, when gun is clean internally (its dirty, we find hot water does the trick)
ball retension clip: the bit that holds balls in place, balls will roll out of the end of the barrel if this is happening.
but if you do have any probs that you cant sort (which your not that likley to to be fare), take it to a site where they use tippys, theyll at least be able to tell you where to get it fixed
ps, did i forget a problem? think i missed one.....