I am planning on putting them about 5-6 feet up. The house has decently tall ceilings, so this will still leave quite a bit of room between them and the ceiling. I'm hoping not to lose too much bass, the speakers put out pretty good bass, so I'm thinking that with a solid mount, they should still be decent.
I'm heartened to hear that hanging them worked good, I can only imagine that solid mounting them will be even better. Is screwing the mounting plate through the bottom going to cause me any problems? It didn't appear that it would when I took a look inside...
I'll have to test fit, but Im thinking that I will end up with the speaker close to the position described, bisecting the angle of the walls in front, a few inches from the wall at the bottom, maybe half a foot out (pointed down) at the top.
My biggest concern right now is screwing the mounting plate to the bottom.
Edit: I like the idea about the speaker grate, I may end up doing that.