Perhaps something like ..
Hatfield and the North - Mumps
National Health - Tenemos Roads
Yes - Close to the Edge
ELP - Tarkus
Pink Floyd - Dogs
Jethro Tull - Thick as a Brick
Harmonium - Hostoires Sans Paroles
Soft Machine - Slightly All the Time
Caravan - Nine Feet Underground
Rush - 2112
I like all these songs a lot and they also add up to a little more than 3.5 hours of music
