www.pricewatch.com
Through a link there 8 months ago I got my P4 2.8 ghz with a gig of DDR ram, GF4 ti4200 128mb, nice soundblaster card, lovely speakers, and a 19" monitor for just shy of $1400.. I know i could get it a bit cheaper building it myself, but I'm way too lazy for that, never done it before and don't want to start now.
Oh yeah, it also has a L337 thermal temperature display.