Well, I think even the Amd users will agree, (im one myself), The dual core intels would be your best bet. Amd's are generally best for gaming, and intels are better for multitasking and stuff. Plus the loads of Cache that intels have will help out quite a bit.
Antec Super Lanboy
AMD 64 3800 S-939 Newcastle
MSI K8N Neo2 Platinum
1.5 GB pc 3200
WD 160 GB IDE
Viewsonic 22\" Widescreen 1680x1050
Coming Soon: Athlon 64 4000 San Diego/Z-5500/G7/Vista