watched a programme on prog rock the other day, and realised why i like it, so am having a bit of a nostalgia sesh. not all prog rock, though.
Can - Tago Mago (which did my head in completely this morning, unsurprisingly).
Caravan - For Girls Who Grow Plump in the Night.
Jethro Tull - Living in the Past.
early Genesis (i can hear dunc groaning

).
Mike Oldfield - Tubular Bells (love it, especially the Viv Stanshall version of the Sailor's Hornpipe, which is fecking hilarious!)