Yes and Camel are probably some of my favorite bands. I have 3 Camel LP's and 6 Yes LP's + 3 LP's from Rick Wakeman (the keyboard dude from Yes). I also have 2 Emerson, Lake & Palmer records, but I rarely listen to them. I don't even know if I wanna keep them, as they're a bit too much of crazy experiments than good songs IMO! I think they're a bit more acid than prog. I also have 3 records by Emerson's old band The Nice, but I consider them acid rock! A lot of their stuff is too weird as well, but they have a couple of good songs. I also have 3 Rush LP's. I haven't heard them that much, but I plan on doing so soon. I recall them as being pretty good though!
I like prog. metal, but doesn't really have that much of it. I have "Images & words" by Dream Theater and Behind the Curtain (Danish band)'s demo. I also just bought "Disconnected" by Fates Warning at a library sale, but after one listen it sounded pretty crappy! I also have their "No exit" LP, but have only heard the first two songs, which sounded crappy as well!