For that price the GTX 295 is a good buy. It's faster than a 6850 or even a GTX 560 and Radeon 6870, but it lacks DX11. Even so for the price you can't do much better. Get the 295
I'm not interested at this point in DX11 as my only interest is to play Star Wars The Old Republic which currently using DX9. I'm looking for the "cheapest + high performance" combination.