PMs replied. The CompUSA price is with rebates, so I can't do lower than advertised. I might be able to handle shipping for you, though (around $10 out of my pocket).
The Antec Neo HE 500W PSU is pending. I've added a 3 gram tube of Arctic Silver 5 Thermal Compound and the very badass Klipsch ProMedia 2.1 THX-certified 200W Speakers to my list.
EDIT: NVIDIA 7900GS video cards and a compatible cooler have been added.