Two Jefferson Starship and no Jefferson Airplane? Unless you have some and it's left off the list...get on that! I'm a big psychedelic music fan, so here are some suggestions. Not sure how easy some of these will be to find...most of them I get off vinyl reissue sites for about 20 bucks, or I find them on ebay.
Note: a few of these sound really, authentically dated...for me, that's kind of the point. I love my '60s psych to SOUND like '60s psych. But I know for lots of people that could be a turn-off.
H.P. Lovecraft - H.P. Lovecraft II
Donovan - Sunshine Superman
Pearls Before Swine - Balaklava (lo-fi and lispy, might not be everyone's cup of tea)
Magna Carta - Lord of the Ages
Comus - First Utterance (folk music on a bitter, violent acid trip)
Flower Travellin' Band - Satori (the Japanese equivalent of Black Sabbath, vocals reminiscent of Ozzy and awesome, heavy, psychedelic guitars)
The Pretty Things - S.F. Sorrow
If you're looking to collect some awesome psychedelic cover art, here are some of my favorites. (Of course there also the obvious ones like Jimi's "Axis Bold as Love" or Creams "Disreali Gears", both are classic for a reason).
