GTX 570/560 448 or GTX 260 Core 216 in SLI

[Hellstalker]

Im in a dilema right now. Im about to upgrade my gaming rig and I have a GTX-260 Core 216 card and was thingking in buying a newer GTX-570 or maybe GTX-560 Ti 448, but yesterday I received word that a friend is selling his GTX-260 card (exact same card as mine).

My doubts are:
1- Should I dump my old GTX-260 and get a newer GTX-570/560 card or should I buy the other GTX-260 and run both in SLI? Witch solution would yield better performance? Besides DX11, what would I be missing with the GTX-260?

2- In case of the SLI solution, I have a Corsair 750TX V1.0 PSU, would it be enough to run both GTX-260?

New build will have:
- i5 2550K
- Asus P8Z68-V PRO/GEN3 (Most probable)
- 3 WD Caviar 500 Gb (cause I already have them)
- 2 x 4 Gb Corsair Vengeance 1600
- Creative X-Fi Titanium Fatal1ty Pro Serie (already own)

Im open to any suggestions, I dont know about Kepler but as all new tech I assume it will be awhile before I can afford one

 

[gary1]

I would use the 2500k. Wait till Kepler comes out and get two 570's for like 500$. Or get a GTX 580.

 

[Gman450]

If you've got the money, a single GTX570 should outperform GTX260s in SLi.
And yes, that PSU is good enough to handle crossfire.
The main thing you'll be missing would be DX11. Apart from that, nothing else.
Also, if you're going for the i5, get a 2500k, 2550k is not worth it IMO. The difference between them is that the 2500k has got an iGPU, whereas the 2550k does not.

 

[Hellstalker]

I may be able to source the money for the newer 570 but if two GTX-260 can give me the same performance for less then I would take the SLI route

 

[Gman450]

I may be able to source the money for the newer 570 but if two GTX-260 can give me the same performance for less then I would take the SLI route

I don't think it would be able to give you similar performance. But it would be give almost the same performance as a GTX560Ti.