had 6 spots there would be mine:

1) Jimi Hendrix - Axis Bold as Love
2) Rush - 2112
3) The Beatles - Abbey Road
4) Led Zeppelin - Physical Graffitti
5) Pink Floyd - Wish You Were here
6) Yes - Fragile

It would be tough, but I think I could make it through life with just those. Fortunately I have double Sony 400 CD Carousels at home that can store up to 800 discs so I will never have to make that choice.