Every collection should include recordings of the beautiful and thrilling music Tchaikovsky composed for the three great ballets, The nutcracker, Sleeping beauty and Swan Lake. I've suggested in the past a disc of highlights from Swan Lake, but a 2-disc set of this glorious music in its entirety is available at bargain prices from about $6 up from various Amazon sellers .

Note that this is in fact a 2-disc set of the complete music, not a disc of the highlights. It's the great performance that the first Amazon reviewer(a symphony orchestra oboist)was willing to pay $105 for six years ago when it was out of print.
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Enjoy the music, not the equipment.