Going to show my age again and plump for:-
Emerson, Lake and Palmer-Trilogy.
Only just edges out Led Zeppelin 4 and Dark Side of the Moon by Floyd.
All take me back to sixth form days (or is it year 12/13!)
Happy days and lucky enough to see all three live.
![Hopping Happily :hopping:](./images/smilies/hopping.gif)