[Kieren]

I've bought quite a few components (including my current PC case) from Ebuyer, and would recommend them to anyone. I've also used CCL, but Ebuyer is cheaper on most products

http://www.ebuyer.com/
http://cclonline.com

EDIT: Sorry just read you're in the US (how dare you leave the UK! :P), but I'll leave the info up for anyone else wondering.

(And thank you for your opinion on my avatar hehe)