I was thinking of upgrading to the new 7970s in Xfire and use a 570gtx i currently own as PhysiX . I'm currently using 3 570s in 3way sli on 3 25" asus Ve258q monitors. Would it be a good choice of upgrades? My current specs are
I7 - 950cpu (1366 socket)
12gigs of ram tri channel
120gig SSD corsair Force 3
1TB data drive
corsair 1000W HX psu
3 570s 3way sli
3 monitors ASUS VE258Q in surround 5760x1080
hd 7970 crossfire will give better perfromance then that and it has the newer tech then that card it can handle most of the games on higher resolution better then gtx 570 so for an gpu i will choose hd 7970 cf and why you want 2 hd 7970 single can do all the things.
gtx 570 is a pretty powerful setup.a single 570 is able to play most of the games(i guess almost everyone)on high settings.i am not very much impressed with 79xx cards but that's just my thinking.i would suggest waiting for gtx 6xx cards.
I fail to see why you want to upgrade right now. Even if you are not satisfied with your 3 570s (which I doubt), I would strongly suggest that you at least wait for nVidia's next batch of cards. And btw, I don't think you can use an nVidia card as dedicated Physx with an ATI/AMD setup.