I also told above and I'm repeating it now "the 6950 2GB can be unlocked to 6970" and 6970 performs better than 560Ti and crossfiring 6970 makes it even better then 560Ti SLI (coz 69xx series have a very good crossfiring scaling.there are hundreds of guides around the net,just google it)and I agree with you that Ati are poorer in tessalation than nVidia and for PhysX,it isn't that much important unless you are playing games like Batman:Arkham City etc.So,my choice is to get a HD 6950 2GB and flash it to 6970 and crossfire it if you want to do that.