Nice job. I checked out the svn and browsed through the tracks... the ones i think sound good (have that cube2 feeling about them) are these:

TNZ - Here They Come
Warhector - Cold Ambush
Xenogenocide - Epicity
Xenogenocide - Project XeRa 4
Xenogenocide - Stick it in your pipe n smoke
Xenogenocide - Unfilled Void

I've already added these tracks to the game on my computer, i actually quite like them.

Not so sure about the others, heavymetal isn't my favourite genre of music :)