Hardware shopping, How about AMD if make it as a small server?

Hi list: The next month, i will setup a small server as maillist/web. But i could only afford a little money. Then i think of AMD. But i never used it to be server even in a very small envirement before. Aybody has experience with amd cpu ? Is it stable and powerful ?? BTW: which brand of motherboard you are using ? This small server will run email relate service, and for about 10 virtual Host customers, perhaps mysql would run on it.. ftp and rsync are must. Any suggestion is welcome ,and thanks a lot :)) - "Zhiqiang He"