Originally Posted by Puddle Jumper
The GTX 275 is more expensive and slower than the HD 4890 so I would stick with the HD 4850x2.
I beg to differ, the GTX 275 has the HD 4890 in most gaming and synthetic benchmarks used the only real exception being Crysis, oddly enough as Crytek prefers nVidia GPUs, mainly due to it's 1 GB buffer.
And even then the difference is negligible ( maybe 2 FPS faster on certain resolutions).
The cards trade blows depending on what games and resolutions but overall the GTX 275 manages a slight lead over the HD 4890 from the majority of what I've read..
Just google "GTX 275 vs HD 4890" if I'm not a credible source
Personally I'd go with a 4890 so that I could upgrade later but the 4850x2 would be the bang for buck no doubt and would also be more stable