VC Suggestions for this Rig and LED TV

I'm building my first comp and need some help choosing a VC. There are way too many to choose from and I'm not sure what will work best with what I am choosing. Here's what I have so far:

Case: Lian Li PC-K60
CPU: AMD Phenom II x3 Black Edition
Mobo: GIGABYTE GA-MA770T-UD3P AM3
Memory: G.SKILL Ripjaws Series 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600
PSU: OCZ ModXStream Pro OCZ500MXSP 500W
HDD: SAMSUNG Spinpoint F1 HD753LJ 750GB 7200 RPM SATA
CD/DVD: Sony Optiarc 24X DVD/CD Rewritable Drive Black
OS: Win 7 64-Bit

***Is that PSU large enough?***

I am also looking into buying this monitor but could use some help here too:

http://www.newegg.com/Product/Prod [...] 6824005132


LG W2242T-BF Black 22" 5ms Widescreen LCD Monitor - Retail

* 1680 x 1050 5ms
* DC 8000:1(700:1)


***I'd like to spend around $100-$150 on the VC. I also have a 50" Samsung LED TV that I would like to hook up to if possible.

**I play WOW and SC II (in the future)***

Thanks in advance for the help!!!

Sounds good but is there another card that is similar that is available now. I'm planning on making a purchase tomorrow? I don't think that card is available until 11/10. Thanks for the help!!!