I don't collect music, I listen to it. I have one Boltz rack that holds about 600-700 CD"s. About 80% of those are loaded onto MDMS (Sooloos) and/or the MS-300. As I add new CD's I delete those that I do not listen to from the servers and trade or give away the physical discs. (I do not load discs and sell or give away discs. That is not legal in the US).
I would give up the hobby before I had to live in a cluttered up room like Ken Kesslers. :no