Prog Rock.....Porcupine Tree?

Porcupine Tree has many different sounds so I would need to know what you like about them to be able to recomnmend as CD. For the more atmospheric stuff I really like Coma Divine. The newer CD's are more rock oriented but still contain some great musical passages. If you feel like one of these, the latest Fear of a Blank Planet is great. Lightbulb Sun is probably the best place to start to get an idea of what they are about.

If you like Porcupine Tree but would like to see what they would sound like if they were more pop oriented you should check out Blackfield. This is a collaboration between Steven Wilson of Porcupine Tree and Eviv Geffen (sp?), an Israeli pop artist. They have 2 CD's out and both are great as well as a really good DVD.

I agree about Riverside. I really like all 3 of their CD's but Second Life Syndrome is my favorite.

Here is a stretch Zig, try Opeth. They are a band out of Sweden and have a sort of mutual admiration with Steven Wilson. You can even see each other's influences crossing into the other's music. But beware, they are a death metal band with cookie-monster vocals which they alternate with clean. The music is amazing and you will get somewhat used to the growling. If you want to start off lightly with them, get their Damnation CD which has no growling and soft jazz-like music. If you want to dive in get Ghost Reveries which is amazing. Their DVD Lamentations is also a good start since it has both styles and you can see what lovable guys they are.