Hi,
I need advice as im going to upgrade my graphic card....i have a working SL 10.6.8 from NAWCOM's method

Im thinking about Powercolor AMD Radeon HD DDR5 5770 1 GB Graphic card,
it will cost me INR 5500/-
i have heard that it performs better than Nvidia GTS 450 and 550Ti, and is cheaper than both

Please suggest me if its meeting, My primary requirements are:
1. Gaming performance
2. HDMI port for audio+ video
3. works OOTB for Lion and Snow Hackintosh (I have MSI 890GXM Mobo and AMD phenom II X4 955 BE)