CD's???  Some don't know what those are either, since everythings MP3's now...  Three albums?  That's a tough one.  I know I would try to make them all be box sets so I'd have as much music as possible...  Although that may be cheating?? 

Can't nail it down but it would go something like this:

Loreena McKennitt: Nights from the Alhambra (two CD's)
Old Blind Dogs: Close to the Bone
Led Zeppelin: The Complete Studio Recordings (10 CD Box Set)

Unfortunately if I thought about it tommorow it would probably change some.