Prog Rock.....Porcupine Tree?

Waszawa is a great starting point,has I believe three songs from Lightbulb Sun. The price for Lightbulb Sun on CD or Album is outrages on ebay although I have seen some japanese imports on Ebay going for twenty dollars. Wait because it is being re mastered and released this year with extras.
Another prog band you might like,it has heavy influences of Porcupine Tree and Pink Floyd is a new band out of Poland called Riverside. Try their new offering Rapid Eye Movement.

I personally like In Absentia the best but it is quite heavy - I have to be in the mood for it. Lightbulb Sun has gotten ridiculously expensive these days. Great to hear about the new remasters! I didn't know about them - thanks for the tip.

Arthur

Deadwing is another good one, try Frost or Sylvan if you like PT

Agree with Qdrone about Riverside, but I'd start with either the first or second one. Rapid Eye Movement is the 3rd best IMO.

A dissenting opinion on the best PTREE starting point. I'd go with Stupid Dream, their most acessable. If you want some extra crunch/metal 'In Absentia' and the new one 'Fear of a Blank Planet' are good bets.

From what I read, the band won't be touring in 2008 - the drummer is working with King Crimson and the guitarist/writer is doing some solo projects.

Just got into this group myself. Stupid Dream is one of my favorites as well as Voyage 34. Their new LP is very good as well. burningshed is their label check out the web site. Their lead singer, Steve Wilson, has a ton of side projects so there are those groups to look into as well.
Another member here at audiogon "proghead" is into PT big time and has given me alot of info on this band. I just purchased a few things from him as well. Currently he has some stuff listed. If you want to know anything about this band he a great person to talk with.
Good luck and enjoy!!