Budget, budget, budget
Depends on the budget. If it's high, get an Anschutz/Cooper/Pardini/Walther/RWS/Win 52. If it's medium, Kimber or Rem 504. If it's lowish, look at CZ 452 or the Izhmash's from Russia.
Check CDNN Investments for deals on Anschutzes.
Also check out a company called Champion's Choice, for gun & gear options.
And as mentioned, just go to some competitions as a spectator to see what they are using... you don't have to have top of the line to have fun, and possibly even win.