It's not really off topic because if I buy the AudioLab CDQ then I am going to have to invest in a Mac Mini to mate with it anyway since the Powerbook is getting old, won't support Lion, and having it connected to the audio system is not convenient for me.
I too keep reading about how amazing a Mini with Puremusic sounds.
I have also read that Sooloos has a problem with jitter and I expect, if true, the MS600 cleans that up.
Hmm...

Linn Genki (cd), Linn LP12 - SimAudio Celeste P5003 (preamp) - Dynaudio Focus 110A (Active speakers). Meridian Wannabe.