The Orange on dark took some getting used to but I liked it after a while - you could run the stuff thru a spell checker. I liked the overall feel 7/10. Good luck
I am a keen 3d games player and have been trawling the reviews- the one I am going for is the AMD 3800+ x2 Manchester. It has a large cache and sounds very over-clockable too. I'm also going for an nvidia 7800GT. I think the dual cores will offer a bit of headroom as new software takes avanatge of the double speed possibilities.