Newegg and Pricewatch: useful resouces for building a PC from scratch

Slashdot has a story about where to get parts for building a PC from scratch. Two sites come up a lot: Newegg is recommended over and over again as a good place to work with for cheap (but high quality) parts. Others mention PriceWatch as a place to compare prices, but warn that the stuff that comes in with the lowest prices may not be worth having.