I am updating my living room to put in a 5.1 system. More like super sizing it without going to a full blown HT. I have about $3500 to use for Atlantic in wall speakers for the front, back and ceiling surrounds. The front is 11 foot wide with a staircase on the left. The room is 20 feet long with the back 14 feet wide. I am not worried about sound into other rooms. Sound is under control thanks to this site, just a good listening experience in the living room. According to my research the front should be placed about 42 inches off the floor tweaters down. That should be high enough to get most size tv’s under the main since the viewing will be about 9 feet. My questions are as follows: geocities.com/pgm20001069/index.html A) Will the a/c feeder (IN RED) still be a problem even though I plan to box the speaker mounting kit in rolled roofing material. B) Which configuration (a or b) is best for changing the room to make the fronts the back and the backs the front. Darn Those windows.