Definitely Dark Side of The Moon. Probably four on vinyl, one cassette, four or five standard CDs and another three special editions. And it's not even my favorite Pink Floyd album. Definitely up there. Probably my #2 but it's no Wish You Were Here. For a couple left field choices, Sarah McLachlan's Fumbling Towards Ecstasy and Enigma's MCMXC ad. At least six of each. Maybe closer to eight. All CDs for the Enigma. One cassette for the Sarah McLachlan. We kept getting my girlfriend/wife's friends into them and the CDs kept disappearing.