The Wayne Horvitz stuff smokes (the President and Pigpen discs are cool too).Also try:
Acme Rocket Quartet (1st, self titled)
Banyan (any)
Chicago Underground (Robt. Mazurek, Playground)
Critters Buggin' (Host) all are good tho'
Dennison Kimball Trio (Soul Machine)
Eskimo (Some Prefer Cake)
Friends of Dean Martinez (Shadow of Your Smile)
Charlie Hunter Trio (Bing Bing Bing)others are good too
Orange Symphonette (Oranj Album))
Playgroup (Epic Sound Battles)
Marc Ribot (Prosthetic Cubans)
Sex Mob (1st and 3rd)
The "trip hop" element can be percussively kind of pedestrian and some of the above stuff veers off from it a bit. You may find some of the following interesting as well:
Squarepusher (Feed Me Weird Things, Big Loada, Latest)
Ui (Two sided Ep/The Sharpie)
Tortoise (1st two)
Vandermark 5 (Singlepieceflow, Target or Flag)