Apparently, Spotify has a playlist especially for me. I've been trying to find modern psychadelic/experimental stuff for a while now, but keep coming up empty. So, last night, I was absently looking through the browse feature on Spotify mobile when I came across a playlist for the exact thing I have been looking for for months. It's a bit less avant-garde than I would like, but it has already led to a ton of new finds in just 2 hours of listening. It should provide a fantastic jumping off point that will eventually lead to the more experimental stuff I am looking for.
Source: Spotify
"Practially every one of the top 40 records being played on every radio station in the United States is a communication to the children to take a trip, to cop out, to groove. The psychedelic jackets on the record albums have their own hidden symbols and messages as well as the lyrics to all the top rock songs and they all sing the same refrain: it’s fun to take a trip; put acid in your veins."
Source: Spotify