Which music server to buy?


I am considering bulding my own server, is it really as simple as buying the NAS, loading either iTunes or Squeezecenter and controlling with their interface?

What NAS should I buy? I want it to be able to function with NO PC.

I also want it to do multiroom as well as doing duty in my hi-end setup. I love the Squeeze stuff, but wondering if iTunes would work the same with multiroom using airport expresses where needed.....could it stream different music to different rooms?
acurus
I love my squeezebox but w/o a PC, check out The Music Vault. I'd grab one if not for already being set up.
Cerrot,

I noticed you have an Esoteric X03SE in your system. I had one, it was my favorite player of all time. I am nervously entering into computer audio, do you think it is possible to approach the sound of the X03SE with a server and a DAC like the Wadia 521?
I second the slimdevices squeezebox or the more expensive Transporter. The Transporter has a better DAC and it looks a whole lot more professional. I have one of each and they don't(anymore) require the computer
Check out the Linn Klimax DS. You can use a cheaper Sneaky DS for the other rooms.