antivirus for windows 2003

i was using kaspersky 4.5.0.94 for win file server. but its very hard to resources . so i was waiting for 5 ver.
but in 5 ver there is no adware and spyware( only for win 2003 version) i talked to kaspersky support so....
i am waiting for mcafee enterprise 8 i had relese candidate but it has 3 critica bugs i reported to mcafee so they will fix it too also i tried symantec corporate 9.

the best i think are mcafee enterprise 8 ( beta) and kaspersky

yesterday i noticed msk anti 2004 can anysay something about it.
cos i installed it on win 2003 . it has to hight heuretic scan cos on all ( lol) most of all programs it was said : heuretic scan maby virus
it was clone cd and my drivers ...... many exe files
does any one know about this one?