I currently have two 9600 GT's in my 2.4 ghz quad core. I was thinking of upgrading to dx 11 compatible card. The 560 ti looks decent and is in my price range (less than 300). Would a single 560 ti be worth forgoing SLI/Crossfire? And is there perhaps a better option to move to a single card in that price range?
GTX560 Ti is faster than 9600GT in SLI. GTX560 Ti in SLI should be faster than GTX580 but your cpu will bottleneck such a setup. even with single GTX560 Ti your cpu will bottleneck the card at it's stock clock. for less than 300 you can look for this if you buy from newegg: