Well, the fact that TCWO includes some LifeSavers in every CPU I have purchased from them, and sent me a new 1800+ via second day air shipping when I had to RMA a DOA chip (I had not bought the heatsink, and was working with the 15 day warranty).
They are top-notch in my book, and you'll notice that Newegg is copying their prices. While I don't advocate buying entire systems from TCWO as prices on other items are higher, that flat shipping can save you a LOT in the long run.
Newegg, TCWO, and Mwave. The three places that get more of my money than I care to admit.