In your collection, is there anything you particularly obsess over, something that would make other collectors like us, if we were visiting and looking at your collection, say, 'Holy Smokes!'? Having everything the Beatles released isn't going to cut it. You have to be obscure or unusual than that. I'll start. I have 67 separate recordings of Bach's Mass in B Minor. And they're all two discs (except for a couple DVDs or when it's part of a larger CD box set). What's your obsession?