normally i would recommend a bko,but after owning two i find them to chop alot (w/out PDS) and to often break down (even when you take care of it).
i would recommend the Dragun T.E.S.
it comes with an anti-chop eye and is pretty fast. the marker runs around $250 or so check out
www.xpaintball.biz for it. also the gun is fairly accurate, but get a new bolt and barrel and it will be fine.