Recommended music similar to TDB

Ok-

I realize this has probably been discussed before (I've seen a few postings here and there but nothing concrete) but I'd like to bring up the topic again:

The Division Bell - personally, my favorite PF album. The slow, relaxing, trippy style along with a medley of instruments they use I believe make an excellent combination.

My favorite song would have to be Cluster One, just with the mood it puts me in. While I don't intent to bring up the topic of drugs (unless others would like to), I first heard that magnificent piece while coming down from my first good trip - this might help to explain the strength of my connection to the song.

On to the main point... I have been searching high and low for music very similar to TDP (Cluster One in particular), and yet most of my effort seem in vain. Some of the decent atmospheric/ambient music I've discovered includes Moodfood by Moodswings (http://www.ambientmusings.net/moodswings-moodfood.htm), but yet still falls greatly short of PF. I claim to be no hardcore PF expert, just another fan loving the music to help explore the unknown.

Can anyone recommend artists/albums/songs with music similar to what I am searching for? I've heard a good amount of Floyd but yet don't believe they have anything else better than TDB (for only this particular purpose, of course... The rest of their music is amazing as well), so I am not restricting myself to Floyd only.

Any suggestions/recommendations (especially those who can relate to my experience previously mentioned) would be *GREATLY* appreciated. Thanks again!