GTX 560ti, 560 ti 448, 570 - What's the most bang for buck?

Bang for the buck is GTX560TI http://www.techpowerup.com/reviews/Zotac/GeForce_GTX_56... The 15-20 % performance difference from the other cards make them a viable option for higher resolution than yours.

Perceived value is a personal thing but if ya thinking strictly "bang for the buck", the factory OC'd 560 Ti's (900MHz) have a clear advantage above the $200 price point t 43 cents per frame in a single card configuration and 50 scents per frame in SLI

Guru3D uses the following games in their test suite, COD-MW, Bad Company 2, Dirt 2, Far Cry 2, Metro 2033, Dawn of Discovery, Crysis Warhead. Total fps (summing fps in each game @ 1920 x 1200) for the various options in parenthesis (single card / SL or CF) are tabulated below along with their cost in dollars per frame single card - CF or SLI:

$ 220.00 6950 (479/751) $ 0.46 - $ 0.59
$ 260.00 6950 Frozr OC (484/759) $ 0.54 - $ 0.69
$ 205.00 560 Ti (455/792) $ 0.45 - $ 0.52
$ 320.00 6970 (526/825) $ 0.61 - $ 0.78
$ 215.00 560 Ti - 900 Mhz (495/862) $ 0.43 - $ 0.50
$ 340.00 570 (524/873) $ 0.65 - $ 0.78
$ 500.00 580 (616/953) $ 0.81 - $ 1.05

http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Personally I prefer the Asus model which is now $15 more (46 cents single card and 53 cents in SLI) as its so easy to get to 1000Mhz

What's your CPU?
The 560 Ti's the best value-wise, but the 448 core is significantly better, and not that much worse for the dollar. If you're willing to spend $280, it might be worth it. It'll match a stock 570 when OCed.

The CPU is a Core i7 2600k. The budget is around $300, which seems to be about the price for the 448. Longevity would be good, is the 560 ti likely to last me a couple years or is that one more reason to step up to the 448? Also, Twin Frozr III seems popular.

I think I am going to spring for the Frozr GTX 570. I can afford the bit of extra and it is a little more future proof since I will be more likely to SLI it in the future over the 448. Thanks.