How is your many titles in your digital collection

1500 CDs, 2 SACDs(bought for CD layer), nothing else. Here in UK there are still many good classical concerts on FM to supplement your disc-listening! "Do you listen to them all?" is a misconceived question, because I listened to them as I bought them, and return to various areas of repertoire (baroque, avant-garde, pre-war English, Copland & Bernstein etc. etc.) as my desires dictate. A live concert may inspire exploration of a composer etc. I too feel pretty sceptical about buying things twice over. I love the Mercury classical CD transfers and have many of them, but buying them again on SACD? "Never as good as the first time"! Its a shame that in order to hear the 3-channel originals, you need all the domestic detritus of a multichannel installation...