hanselthecaretaker said:newegg.com is a good place to go for most all your computing needs. Or pricewatch.com for extreme bargain hunters.
Newegg sucks if you don't know exactly what you're looking for, their sorting options and spec sheets fall short. I'm dissappointed that my favorite old vendor, www.microwarehouse.com, has been absorbed by CDW. I wonder if they were victims of Katrina? The guys at www.directron.com seem to have decent prices, that's where my motherboard came from in 2002.