PC build + GTX 275 or 4890 PCS??

[L0stpr0phet]

Hi All,
Hoping for a bit of advice with picking out a graphics card for an i5 build im doing for a friend.
I'm thinking of either:

Powercolor ATI Radeon HD 4890 PCS
http://www.overclockers.co.uk/showproduct.php?prodid=GX-102-PC

or

Sparkle GeForce GTX 275
http://www.overclockers.co.uk/showproduct.php?prodid=GX-015-SK&groupid=701&catid=56&subcat=1410

or even a 2 x PowerColor HD 4770 512MB in xfire??

The rest of the PC build is currently (isn't set in stone):
MSI P55-GD80 Intel P55 (Socket 1156) DDR3 Motherboard
G.Skill Ripjaw 4GB (2x2GB) DDR3 PC3-12800C8 1600MHz Dual Channel Kit
Intel Core i5 750 2.66Ghz (Lynnfield) (Socket LGA1156) - Retail
Lian Li PC-60FW Aluminium Midi Case - Black (No PSU)
Corsair TX 650W ATX SLi Compliant Power Supply (CMPSU-650TXUK)
Western Digital Caviar Black 1TB SATA-II 32MB Cache - OEM (WD1001FALS)


Any advice would be much appreciated also can anyone recommend a cooler for the i5 CPU Socket LGA1156?

Thanks in advance for any replys!

 

[L0stpr0phet]

ok thank for all your help guys, think ill go with the 4890