Also don't forget you need 3rd party storage as well to backup the Sooloos and keep off site.
I actually do things the other way around. I rip CD's using dBpoweramp in a Windows PC then both copy the FLAC files to a NAS drive AND import them into my MD600.
My STORA NAS drive runs the CrashPlan server so it backs itself up to the cloud (Along with my precious pictures and family videos).
You could say that I use my MD600 as an "data end point" (

)
From the MD600, I can export the lot to iTunes in MP3 format. From iTunes (MP3) I can put it on my Playbook or Blackberry bold phone to take stuff with me when I go out and about.
/Marcus