Here's a band you should be requesting. Yesspaz, I think you'll like them - great riffs.
http://www.djamkaret.com/
These guys are one of the more exciting prog bands out there - lots of jamming, making them potentially more accessible than some prog bands, but still there's a lot of polyrhythms, interesting arrangements, and plain old skill that keeps it a level above straight rock. No vocals for those who have expressed a dislike. One of their albums, "Suspension and Displacement", is very ambient and spacey - good, but my least favorite. The rest of them ROCK!
Enjoy...