Okay, I have been and AMD fan for some time, and definately will be waiting for the Hammer before I consider all options on a new pc... but heres the scoop..
the new p4's, with 800mhz front side bus, and the new canterwood motherboards blow the competition away.. of course, once these hit, (as its not a paper launch), should be any day, they will not come cheap. However, if you want the best... this is it..
Toms hardware review
Hardocp review