Maximum PC

Newegg has 11 models of the new GTX-660 Ti cards in stock (as of this posting), unfortunately they're priced a bit higher than I can handle (I figured as much, but had my fingers crossed...), starting at $299.99 + shipping a the 'egg'

Interesting to note, the reference design is virtually identical to the GTX670 with the exception of 192bit memory bus Vs 256bit for the 670, 24 ROP's Vs 32 for the 670, 384KB L2 Vs 512KB L2 for the 670, and slightly lower TDP, 150W vs 170W for the 670.

I have a new build coming up
but I currently have evga 570's in my case
think I will have to go with 670's

That is one option, but check out the benchmarks... Here's one from Anandtech, though most of the reviews I've looked at show very similar results... the 660 is a significant upgrade to the 570 even at 2560x1600 & performs within a couple percent of the 670 in most games for $100 less... Battlefield 3 @ 2560x1600 Ultra Quality FXAA high from avg 53.9fps for eVGA Superclocked 660 Ti, to avg 58.4fps for Gigabyte's top card, while the 570 (not sure which one) gets just 39.7fps on average... Check out the Overclocked Gaming Performance page where the Gigabyte 660 Ti even beats the 670 they used in a couple games...