Best progressive rock album side

I know it's a digression, but since you mentioned Zappa/Verve, the unnerving prescience of "Trouble Coming Every Day" on "Freak Out" keeps coming to mind. I saw the original Mothers line-up play at the Phoenix Star Theater shortly after "Freak Out" was released. A memorable show (almost on par with Capt. Beefheart at the "Fox West Coast Theater" (an abandoned cinema taken over as a concert venue) in Long Beach, CA circa 1972 where The Magic Band performed with "It's a Beautiful Day"

Enough with the naysayers. The more music one listens to, the more one realizes there is great music in all genres from all periods of time. You have to be curious and seek it out with an open mind. Only close-mindedness would generalize quality of musicians based on genre. Absurd to say such things. That said, when recording quality comes into play some music is unfortunately simply unlistenable on a revealing system. It’s like people saying this tweak or that component must be overpriced and not be worth the money (or provide great sound quality) when they haven’t even hooked it up to their own system and listened. At the end of the day this hobby and the love of music or a passion. If you don’t have the passion and a desire to enjoy the journey find another hobby!

Frank Zappa 

Hot Rats whole album

Camel : Mirage (1972)

Side 2

Earthrise, Lady Fantasy + a,b,c. (all parts)

Voted #51 of Top 100 Prog Rock albums of all time in a 2014 poll in Prog Magazine.

A lot of my friends who like progressive rock were unfamiliar with Camel.

A hidden gem?

From the Sage of Houston, Billy Gibbons:

Brian Eno and Robert Fripp's foray into some artful excursions into some ethereal electric experiments. There was a lot curious activities emerging in London, Amsterdam, and Berlin back then developing some fiercely fuzzy of synth-like effects way outside the norm which really blew the lid off things