Top 5 Prog Rock Albums

[Lemur]

I usually don't post on the forums, but I saw this thread in the front page and mulled it over in my mind. I thought about it in the shower this morning, and I think I have a general idea of what my favorite prog albums are:

Kenso - Fabulis Mirabilibus De Bombycosi Scriptis
Gryphon - Raindance
Gentle Giant - In a Glass House
Porcupine Tree - Stupid Dream
King Crimson - Starless and Bible Black

It's actually really hard to choose just 5 albums.