Naim N-Sat. I don't like them much, but they're a natural pairing and go right against the wall. If they weren't so "wall of sound" I'd like them a lot more.
PMC's DB1i will well, and perhaps the TB1i. I know the DB1 is wall mountable, not sure how well the TB1 would work.
Focal Chorus 705v
Linn Majik 109 (I think that's the current number)
The Totem Arro won't take up more space than a monitor on stands. Due to its small footprint, it may actually take up less space. Not sure how it would sound right up against a wall, but I've heard them about 6" or so away from the wall and they were fine. I'm a big fan of the Arro. One of my favorite speakers regardless of price.