I disagree with the blanket condemnations of PriceWatch. It's true that there are shady dealers on that board, but I can't blame the board on which they advertise. I think PriceWatch is a great place to see the fair market price, and I know from experience that they respond to legitimate complaints about vendors.
I'll quickly add that I am always skeptical of the first few quotes, especially if those prices are a significant departure from the pack. I think one can tell a great deal about the vendors from their websites, as well. Poor design and simple details such as spelling mistakes give away most of the cut-throats right away.
I've been shopping around and I often see newegg on the first page of results, and they are rock-solid in my book
In very general terms, California vendors (besides newegg) have given me bad business before, and I like to stick with non-California businesses. Since I'm close to NY, I get next-day shipping even with ground when I order more locally.