Pink Floyd also = perfect.
No Tool? I think they would probably be considered prog mettal, but I don't give a crap. Danny Carey cranks out beats that break my friggin brain. It takes me a while to count their songs out, much less actually play them, and on top of that, they manage to have an awesome sound as well. A lot of times I think prog devolves into a bunch of highly skilled musicians showing off without creating anything that's actually fun to listen too. Tool (and Perfect Circle since most of the band is the same) manages to pull it off every time.