GPU or CPU?

[gbrittain]

Hey guys just wondering what you think would be best to get 1st an 8800gt or a new cpu

i currently have a 2.8ghz dual core pentium 4 and an 7600gs graphics, im already going to buy 2gb ram.
if i go for new graphics then im going to get the 8800gt i think! but not sure which would be best?!

 

[gbrittain]

mainly use pc for web and msn but do a bit of gamin on days off, but the fairly new games are starting to get laggy on my system. Not sure if 8800gt is compatible, this is the mobo i have - http://www.asrock.com/mb/overview.asp?Model=775Twins-HDTV&s=Intel

 

[gbrittain]

i dont think its compatible with core2duo so it would be a cpu and mobo upgrade for that