I was looking for a little computer hardware help. My framerates have been a little low at times since I have hit Outland, so I thought I would try to upgrade my graphics card. Right now I'm 4 boxing on one machine, but I would like to be able to run 5 in the future. I'm using Keyclone to duplicate keystrokes. My current PC specs are

Windows 32 bit Vista
Asus P5N-E-SLI mobo
Intel E6600 processor
4gb ram
Nvidia 8800 GTS 640
not sure about my hard drive speeds.
2x Acer 22" monitors

Everyone on here seems happy with the new ATI cards, so I was looking at this 4870 from TigerDirect.

http://www.tigerdirect.com/applicati...4&Sku=D10-4872

Does anyone see any problems with that card. I'm open to other suggestions as well. Also, my CPU usage is usually at or near 100%. Should I also be looking at upgrading or overclocking my CPU? Thanks.