www.newegg.com -good prices, reliable, and resonable shipping
and www.zipzoomfly -sometimes good prices (check aginst newegg before you buy), reliable, and free 2nd day shipping on any smaller item (no cases).
Two others, altho not AS good as those two: http://www.buy.com/ also good prices, sometimes will beat newegg! and reliable as well. http://www.tigerdirect.com/ Be careful here, watch the name of the products and only buy the names you recognize. Otherwise, reliable. Don't buy a barebones system or a monitor tho. Liz
And surprisingly, Amazon.com has pretty good deals on somewhat outdated computer components. I got an Audigy LS there about 6 months ago for like 30 bucks. I got a 128MB PNY 5200 for cheaper then newegg too.