My main monitor is a 27 inch at 2560*1440. I do have flanking 24inchers that I might want to try to set up with eyefinity though. (the sides are 1920*1200)
for this sort of setup you will need more than a 270 at least if you try to game across it .
you will want a 4gb card at the min , I hate saying that because i rather go bang for buck ( i love my 270 oc version)
when comparing cards , don't compare your card vs the new card... the new should always win ! Compare the different new cards
if you go to
you can compare two cards and see if it is worth the money, you can also set a resolution ( so your 3 screens combined and look at some results that way.
of course the standard disclaimer that not all benchmarks are equal ... anandtech tend to be a little Intel and Nvida fanboys