First off, I have room in case and the cards will not be bottle necked by anything in my system. I am not going to crossfire, and do not plan on it. I want a card that is quiet and will run under 70c on load and be respectively quiet.
It's a big list, as I really cannot decide. If you have another option that's available in the $300-$350 price range and is better than these, let me know. Also needs to be available in the U.S.
I just picked up the 7970 variant of the ASUS card. Like literally JUST ordered it 5 minutes ago. Pretty sure it's going to be quiet. Probably the most quiet one you can get. MSI if you have a major dust problem. Quite good cooling on that one I'm sure. Don't pick us the XFX unless you want it souly for the baller chrome factor. XFX has been skimping on the features which sucks because they're using a non reference PCB. Not even a BIOS switch. Although the output options are nice in my opinion.
Yeah they replaced my 6950 when I was at fault breaking it...I may not have told them I was at fault, but they replaced it. Took about a month. I wonder if their costumer support is getting better or worse since I last used it. I do know they took away the double lifetime warranty unforunately. That's really good for the card's resale value I believe.
I personally have the MSI 7950, and it's a fantastic card. It's very quiet (I can't even hear it over my case fans, even at full load), and cools quite well. The hottest I've seen it go is around 63 celcius, but that's at stock clocks. The Asus card would also be a great option, and probably runs a tad cooler and quieter.
I have the MSI Twin Frozr III and I'm highly impressed with it. Under load it usually stays around 66c and there is a massive overclock headroom although be prepared for higher fan speeds to counter the heat when doing this too much. It's nice and quiet and much more stable than my previous 5770 xfx was.