2 1GB 9600 GT's vs. 1 GTX 560 ti
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:
most of the card will cost below 300 after rebate. just choose the brand you like from the list
The GTX 560 Ti is probably somewhere between 2 to 3 faster than SLIed 9600GTs.
GTX 570s start at around $320 but there are a number of models that have mail in rebates that bring them down to $300 or if you are ok with that.
Another option is the HD6950 2gb. If you plan on using multiple cards and/or 3 monitors in the future it is a wise choice due to the extra memory.