WOOHOO!!! I'm not the only prog rock fan in here i see. Yes it's VERY sad that most people don't know of Porcupine Tree. They're the "Brit band" (i.e. Coldplay, Travis) that truly deserves more radio play. I have heard Blackest Eyes (from In Absentia) on the radio in Austin and once when I was at school (La Tech), but never anywhere else.
Monstermile...I highly recommend their entire collection because each cd is different, but most people start with In Absentia and work their way back. Personally, I listen to Lightbulb Sun most often and it sounds SO sweet on Axioms (M22's). There's some many suttle details in that album. I'm still dying to see PT live and i think that i missed possibly the best show ever from their last tour. Opeth and Porcupine Tree toured together *sigh*. Well, hope you enjoy their music. It's really great.