Look at the M&K line of surround speakers. They offer both wall-mount and in-wall models, with both dipole and tripole styles available. (I own a pair of M&K SS-150 THX tripoles and think they are outstanding.) For more info about the M&K line of surround speakers, go to the following link:
http://www.mksound.com/
You should also look at the post I made to the thread above, titled "Rear surround speakers and wire".
http://www.mksound.com/
You should also look at the post I made to the thread above, titled "Rear surround speakers and wire".