Well, I know some good Belgian bands.
Some of my friends have a band that's getting better and better. I used to play with some of those guys but then we separated.
The band is called "All we expected", try to look for them on facebook, they got some sounds on there.
It's like some kind of stoner/post metal if I'm right. Don't know how they call their genre exactly they're inspired by Tool (also great band).
Really worth it. They're from West-Flanders btw, where I live.
Some other Belgian bands that I like:
Arsenal
Admiral Freebee
Absynthe Minded
De Mens
Hooverphonic
Flip Kowlier (grew up where I live)
Steak Number Eight
Wallace Vanborn
Zornik
Here you go man ;-)