Thanks for the replies. I've got two pair of the f/x 1000's, with one pair of the side surrounds directly at the side of the viewing position, and the other pair for the surround back. I originally had them mounted 65" off the floor to the center of the speakers, and each spaced one foot from the center of the viewing position so that they were 2 feet apart center of speaker to center of speaker. This was in the basement with unfinished walls (it sounded pretty good to me, but I don't have anything to reference it to). This will be my first enclosed theatre, and I know the sound will be totally different in an enclosed room. Want to avoid moving the speakers around a bunch of times. It would also be nice to have a stud in the right place for each speaker and have the wall box hidden behind the speaker. The Denon manual really does'nt take a firm stand on surround set-up. They show direct-radiating surround back speakers in all of the diagrams, but they don't say in the write-up whether these should be direct-radiating or bi-polar/di-polar. The main reason I went with 4 of these speakers is because I got a real good deal on them, and I hoped that these would create a more enveloping surround. Please keep the advice coming. Also if a yard apart is too much, then what do you recommend? Thanks, Paul B.