Your favorite prog rock music? ?

Opeth.
Aroc (System | Threads | Answers)

I might really like this band if I heard them, but I can't get past the name. All I can imagine is a group of prog rock dudes standing around talking about a band whose name makes everyone sound like they have a speech impediment.

Yes
Genesis
Moody blues
Camel
King crimson
Caravan

Radiohead. I still listen to "Kid A" the most. I wish this group would release more live material.

wow.... and what about Marillion.
and don't forget the Italians had (and still continue to produce) so many great great bands: Banco, PFM, Le Orme....
Il Balleto Di Bronzo.. the list is infinite.

Riverside and Indukti from Poland.

Magma, Pulsar from France

Kenso from Japan

and then you have Anekdoten, Landberk and AGLAGARD from Sweden....