I understand there is going to be quite a dip on the GT200 nVidia cards. Now I'm wondering, should I go ahead and pick up a 5870 or wait for some price drops and pick up another GTX 285 for SLI? I know 5870s are built futureproofed for DX11 but DX11 is still in development anyway and I can wait a bit longer or the release of 5890 and the GT300 series. For now, though, I would love to know how two GTX 285s in SLI compare to a single 5870. Thanks for any input!