There's a reason the GTX 465' and 470's aren't moving and have to be sold below the minimum advertised price. 5850's are available for ~$260 with cashback over at TigerDirect, and compete with the GTX 470's and 480's (when overclocked) for much less money. On top of that, they run cooler, quieter, and use much less power. Drivers, multi-GPU functioning, etc. is all marketing bullshit, and you'll hear it from both camps. Multi-GPU has issues on both sides, due to the intrinsic flaws in the techonologies surrounding it. Since both companies do it largely the same way, they both have the same problems. All in all, considering that the high-end is so close in performance but not in price, and the NVIDIA parts are generally unimpressive, I find it difficult to recommend anything GF100 based.