I have 45 degree angled wall/ceiling in my HT room as well. I'm running with screen and speakers on the short (vertical) wall but always thought it would be neat to put the screen on the angled wall (angled down) and have reclining chairs so you could lie back and look *up* at the screen.
Mounting M60s up there would be a challenge but not impossible.
If you go with speakers & screen on the short wall do think about some kind of acoustic treatment on the angled walls. I haven't done that yet but really need to - the imaging is *not* good although most other aspects of the sound seem fine.
Very early shot (before the projector) And... Doesn't look like there is enough room for a screen but a 4x8 screen fits just fine. The problem is that the angled walls are pretty close to the speakers so wall treatments seem like they could really make a difference.
