My top 10:
1. Comus - first utterance
2. Caravan - Land of grey & pink
3. Van der graaf generator - Still life
4. Camel - moonmadness
5. King Crimson - In the court of king crimson
6. Yes - Close to the edge
7. Porcupine tree - Stupid dream
8. Nektar - Journey to center eye
9. Jethro tull - Thick as a brick
10. Pink floyd - DSOTM
1. Comus - first utterance
2. Caravan - Land of grey & pink
3. Van der graaf generator - Still life
4. Camel - moonmadness
5. King Crimson - In the court of king crimson
6. Yes - Close to the edge
7. Porcupine tree - Stupid dream
8. Nektar - Journey to center eye
9. Jethro tull - Thick as a brick
10. Pink floyd - DSOTM