Don't know them, so I couldn't really comment on them. Although the name sounds vaguely familiar.zehydra said:Porcupine Tree could also be considered Prog Rock andor Prog Metal as well.brunothepig said:Just want to point out the Tool, Opeth and Dream Theater are Progressive Metal. You could maaaaaybe argue Dream Theater are Prog Rock, but I really don't think so. As for Metallica, Progressive Rock? They're one of the pioneers of Thrash Metal. I've never heard anyone else refer to them as Prog Metal or Rock.
Anyway, speaking of only Prog Rock, it's Pink Floyd. Of the bands listed, without a doubt Dream Theater.
They're really more Prog Rock though.
I can't help wincing at every person who spelled it "Dream Theatre" on this thread, including the OP. Yes I realise that is how you spell theater in some places, but it is also the name of a band. Nitpicky, I know, but it happens a lot to me... And I love Dream Theater.