Buying a new card for WoW, Can someone tell the best one I can buy.

I want to get a new gaming graphics card. I would like to play WoW with good performance and high quality. Be really nice if I could play maxed out. Anyone got a card that they recommend will do the job. My computer specs are on the bottom of this post. I will buy an extra fan for it (if it is necessary). Will my power supply affect which graphics cards I can get? I do not what to buy a new power supply.

The cards I thought might be good is:, but you guys know alot more than I do. So please help me out.

1. XFX PVT84JYAJG GeForce 8600 GT 512MB 128-bit GDDR2 PCI Express x16 SLI Supported Video Card (http://www.newegg.com/Product/Product.aspx?Item=N82E168...)

2.XFX PVT95GYDQ3 GeForce 9500 GT 512MB 128-bit GDDR3 PCI Express 2.0 x16 HDCP Ready SLI Supported Video Card - Retail (http://www.newegg.com/Product/Product.aspx?Item=N82E168...)

3. XFX PVT95GZAFG GeForce 9500 GT 1GB 128-bit GDDR2 PCI Express 2.0 x16 Low Profile Ready Video Card (http://www.newegg.com/Product/Product.aspx?Item=N82E168...).


My computer specs are: Intel Pentium 4 3.0 GHZ
1. 2 G of RAM DDR 2
2. Only 305 Watt Power Supply
3. I have a PCI X16 graphics card slot.
4. My screen resoulution is 1280 * 1024 and 19" monitor