Which album sounds the best as a vinyl record?
I really like Frank Zappa
I highly recommend "Hot Rats." It was his second solo effort and proved to be one of the most celebrated works. 
The album is super good. Joe's Garage is good too.
Have you ever listened to the album called "Freak Out"? It was his first apparently.
I have actually listened to all of his albums, plus live releases. So yes!
Perhaps you should look into the music which influenced him. This includes "Edgard Varese, Igor Stravinsky, and Pierre Boulez."
Yeah those are all classical composers. You could say he had interesting taste. 
He was somewhat political too! He said critiqued both the laws which men wrote and the way the laws were enforced.
He had voter registration booths at his concerts in the 80's.
We could sure use more of that. In 2012, only 53% of eligible voters actually cast their ballots.