best wireless distribution?

I have a lot of tunes in my PC mainly for an IPOD but also for my working room listening....and then my high end 2 channel system in another room. The question is what is the best way to get the itunes library played on my main system wirelessly sound quality wise?

I've seen Sonus, Sonateer, Airport Express, Squeezebox etc etc discussed but never in comparison...anyone want to take a shot? And am I correct in assuming that I want digital outs to I can use my Meitner DAC?