Which Geforce GTX 200 series?

I want to spend about $250-$275 tops on a gtx 200 series... i cant decide which is the best to get, all the clock speeds are about the same til you get to the 295 which is way to expensive.... i was thinking about the 275 up to the 285, but there is like 5 different models of each one idk which is the best performance for the price. iv listed the links to the ones im interested in. PLEASE HELP!

http://www.newegg.com/Product/Prod [...] 6814150387
http://www.newegg.com/Product/Prod [...] 6814143183
http://www.newegg.com/Product/Prod [...] 6814150364
http://www.newegg.com/Product/Prod [...] 6814130475
http://www.newegg.com/Product/Prod [...] 6814130478
http://www.newegg.com/Product/Prod [...] 6814130427

which is the best among these? only real differences i see is the clock speeds... the card will be running with i7 920 oc'd to 3.2 or higher if that matters

get the cheapest one unless you have a brand preference

Get a GTX260 or a GTX275

well i plan on oc'n the 275 more then the factory oc.... and the ones i posted are the cards im debating on... idk which of those is better performance wise... which of those is the best?

Edit: ill be running the games at top res also

What is your "Top resolution"? I am going to be running 275 SLI'd

You could pick any card, excepting the recertified one. It was returned for some(possibly bad) reason.
XFX and EVGA are both good and support their product, don't look elsewhere.
Do not count on overclocking to improve performance. You might get lucky, but count on only what is advertised. The most overclocked products have already been binned, and overclocked to their best safe performance level.

yea i think ill go with the standard 633 mhz and so forth 275 and just oc it myself to ftw clock rates, save me about 50 bucks here is my new list of components but willing for opinions( the gpu needs to be changed)

Intel Core i7 920 Nehalem 2.66GHz LGA 1366 130W Quad-Core Processor Model BX80601920 [279.99]

(Dont know which one is better for this build, Opinions welcome)
Foxconn FlamingBlade LGA 1366 Intel X58 ATX Intel Motherboard [209.99]
EVGA 141-BL-E757-TR LGA 1366 Intel X58 ATX X58 SLI LE Intel Motherboard [234.99] (can only run 1600 Ram)

XIGMATEK Dark Knight-S1283V 120mm Long Life Bearing CPU Cooler [44.98]

(If evga mobo, only can use 1600(on specs this is only mhz listed))
G.SKILL 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Dual Channel Kit Desktop Memory Model F3-12800CL9D-4GBNQ [74.99]

(Should be enough power for now and for future sli updrade/RAM)
CORSAIR CMPSU-750TX 750W ATX12V / EPS12V SLI Ready CrossFire Ready 80 PLUS Certified Active PFC Compatible with Core i7 Power Supply [119.99]

LITE-ON Black 24X DVD+R 8X DVD+RW 24X DVD-R 6X DVD-RW 12X DVD-RAM 16X DVD-ROM 48X CD-R 32X CD-RW 48X CD-ROM 2MB Cache SATA CD/DVD Burner [27.99]

Western Digital Caviar Black WD6401AALS 640GB 7200 RPM 32MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive - OEM [74.99]

APEVIA X-TELSTAR-GN Green/ Black Aluminum ATX Full Tower Computer CaseNo Power Supply [139.99]

XFX GX275XADQC GeForce GTX 275 896MB 448-bit DDR3 PCI Express 2.0 x16 HDCP Ready SLI Supported Video Card [234.99]

Monitor is about 200 or so, havent decided on which one yet but got a few in mind

Total= 1432.90 (evga Build)
Plus Tax+Shipping = 1550.00~

Will an Ati work with this setup? or do i need to change cpu mobo ?

ic... for some reason i was thinking if you went ati you had to get a crossfire ready board all have everything else setup for ati(compatibility) but ati is cheaper but which of those 275 is the best? im thinkin about gettin the cheaper standard clocked xfx or evga and then just oc it myself to the ftw settings, save alot of money