Radeon HD 5770 or GeForce GTX 460 (Fermi)

APPROXIMATE PURCHASE DATE: (e.g.: this week (the closer the better))

BUDGET RANGE: (e.g.: USD $150-200) After Rebates

USAGE FROM MOST TO LEAST IMPORTANT: (Gaming, 3D modeling, Graphic Design)

CURRENT GPU AND POWER SUPPLY: (None, Expected power supply: OCZ ModXStream Pro OCZ600MXSP 600W ATX12V V2.2 )


OTHER RELEVANT SYSTEM SPECS: (CPU: AMD Phenom II X4 955 Black Edition Deneb 3.2GHz, ASUS M4A87TD/USB3 AM3 AMD 870 or ASUS M4A785TD-M EVO AM3 AMD , G.SKILL Ripjaws Series 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1333 )

PREFERRED WEBSITE(S) FOR PARTS: (newegg.com,)

PARTS PREFERENCES: (w.e is better)

OVERCLOCKING: No SLI OR CROSSFIRE: No

MONITOR RESOLUTION: 1920x1200

ADDITIONAL COMMENTS: What graphics card is better and why... I know the basics just wondering what factors rule out the other card.

These are the two cards I am looking at:
XFX HD-577A-ZNFC Radeon HD 5770 (Juniper XT) 1GB 128-bit
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

or
GIGABYTE GV-N460OC-768I GeForce GTX 460 (Fermi) 768MB 192-bit
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Also, just want to make sure both will run on the either mobos?