Make your own prog album

1. Soft Machine – Slightly All The Time

2. Egg – Long Piece No. 3 (Part 2)

Have you checked your math ??

Mine would be way too difficult to put together. I have over 700 hours of Space Pirate Radio shows (330 1974-1980 and the rest all from the Twitch show in 3 or 4 hour segments) ... and the variety and mood changes and quality of the material far surpasses the idea of "song" and its listing. 

To me, it has to be a "trip" and even though I have already done a show on the Internet (1999/2000 The Space), I would not be able to select individual pieces that would be satisfying from minute to minute and then the mood has to change ... and for that reason my show at that time was specific to a band with 2 to 3 hours worth of their material. I may do this again, but have not exactly decided on anything at this time, but compiling a list of "favorites" for me would be not satisfying at all ... I would want more of one artist, and not get taken away from it ... that's how hard and deep I listen to so much music ... I kinda live inside it, if you will and the "experience" is more important than anything else.

Four years later, my list would still be mostly the same with but a few alterations:

1. Soft Machine – Slightly All The Time

2. Egg – Long Piece No. 3 (Part 2)

17. Brand X – Disco Suicide

18. Rascal Reporters - Egos Explode

I thought the OP was asking for an album, not a greatest hits?? 

But really, what do I know - it's not my thread

^^ I can't take songs out of their original context

YES- Every little thing

Groundhogs-  3744 James Road

Jethro Tull- Cross eyed Mary

Can- Vitamin C

Hawkwind- Quark Strangeness & Charm

Pink Floyd- Astonomy domine

Magma Rock Duo- Jessica

Procol Harum- Fires (which burnt brightly)

Genesis- Carpet Crawlers

ELP- Living Sin

Amon Duul II- Archangel Thunderbird

Manfred Mann- MEAT  (love this song)

Roxy Music- Pyjamarama

Soap and Skin- Voyage Voyage

Dead Can Dance- The Carnival is over

Grizzly Bear- Two Weeks

Decemberists- Crane Wife

XTC- Complicated Game

Gentle Giant- 3 friends

Interesting list but have to correct you on the ELP song, it's Living Sin (not ''Living In Sin''). Certainly one of their weirder songs with almost a Doors vibe, in fact a Doors song would probably go with that list nicely!