If I was building the rig you are (based on other thread), and ordering the parts today from Newegg.com, I would just go with the Sapphire Toxic
. That's coming from a nvidia fanboy.
For the price/performance aspect I don't think it can be beat for modern games, ie BF3 specifically. The added vram of the Toxic will come in handy for bf3, vs the 1.2gb on the gtx570. Go check the bf3 performance thread, hd6950's seem to be performing better than gtx 570's IIRC. You should
be able to achieve hd6970 like performance with the Toxic, that's why I recommend that card over other cheaper hd6950's.
MW3 won't matter, you could play that maxed out 1080p with your GTS250 more than likely.
I forgot your were upgrading your PSU to 750w corsair. With that PSU, you could look into SLI/crossfire options. SLI/crossfire comes with it's own set of issues, so I have a hard time recommending that. I had 2 GTX470's in SLI, and had no issues in any of the games I played in the last year, but I think other people have. My issue was that I broke one of my gtx470's, so I was down to 1, and that just didn't cut it for bf3, hence the gtx580.Edited by anubis1127 - 10/27/11 at 10:19am