All the wrong advice that is given here makes me sick. First of all the GTX 560 SE is not faster than a GTX 460 v2 or GTX 460 256 bit. Yes, the futuremark score is higher, but does not represent real world performance. The gtx 560 SE is about 10 -15 % slower than a gtx 460 v2 in real world scenarios.
Second of all both Nvidia and AMD drivers are well done. I've had both Nvidia and AMD and I've never had problems with either (had 8500 gt, HD 4850, and now GTX 460)
Third the GTX 560 SE is a rebranded gtx 460 SE with a higher clock speed.
Now given the odd prices in Siberia I'd recommend you getting a hd 6850, yes it's AMD, but it's good.