Two pages and not a single mention of Rush? Shame on all of you.
As far as classic Prog Rock is concerned, Rush, King Crimson and Genesis (Gabriel era) are about the only bands I can swallow whole. Camel, Kansas, Jethro Tull and Hawkwind are nice as well, but not quite up to those lofty standards. All things Canterbury-related I just can't get into, Van Der Graaf Generator make me cringe, Pink Floyd are rrrreally boring save for a few tracks and the likes of Yes and ELP weren't able to sustain my interest in them indefinitely. I definitely prefer some of the Prog-tinged hard rock bands the 70s had to offer such as Queen or Uriah Heep.
On the other hand I'm not all that much into contemporary bands playing Retro-Proggy stuff. That includes Spock's Beard (bore me to tears unless playing Fusion-ish stuff) and Transatlantic but not IZZ, who do it with a spark and charm I have not felt in any other band of that genre. I also never got what's so special about Porcupine Tree. I'm more into Fusion/Math Rock-related stuff (Gordian Knot, Canvas Solaris) these days.
By the way, big ups to whoever said that Fates Warning is the last bastion of classic Prog Metal in 2010. So true. Let's see what reunited Psychotic Waltz are up to.