The big clincher for a lot of people will be the HL2 and source engine performance ati is currently showing against Nvidia. Hate Ati drivers myself and I have been put off their cards because of it, but the results speak for themselves. I'd like to see some 'real' results, not just from Valve before I finally make up my mind though, and by the time I need a new card there will be new ones from both anyway I suppose.