Help me choose a video card!

[Fltlt_HardBall]

I'm a bit pissed that my 1gb 7950gx2 isn't supported by CoD. I suspect it never will be, and since DX10/11 seems to be the way to go now I guess it's time for an upgrade.

With a family to support it's hard to justify shelling out megabucks on a top-of-the line card, but after some research I've found that I can get a 2gb HD6950 for less than $400 over here in South Korea. (Yes, I could get it cheaper on eBay, but after postage and import tax and waiting for the postman I'd rather get it locally).

So here's my question: Is that card a reasonable bang for my bucks? GTX 570s are more expensive and have less RAM, so they don't seem like such a great deal (unless I'm missing something).

By the way, I'm limited to a card which doesn't need more than a 500w power supply, a criteria which the HD6950 meets.

Any insights into the relative merits of ATI Vs Nvidia Vs price would be much appreciated.