Might as well check out Porcupine Tree. I'm not into them but I wouldn't pass judgement on anyone else for liking them! Canterbury IS prog for probably 90% of progsters so you'll want to know it if you're planning to sperg out on the Prog Archives forums. Some of the more recent Swedish prog is worth checking out too. I've been neglecting #progstr of late but I'll dig up some links later on.