Hello all. I'm New HT wannabe with a couple years' background in multi-track recording. I'm looking to put together a new HT system from scratch and have a couple of questions (O.K. fist ones in a soon to be LONG list) about speakers and audio in HT systems: 1) I recall reading somewhere that THX certified systems need ALL speakers and components to be matching and certified. Is this still so, and is the extra mile one goes for 'All-out THX' matching of audio components really worth the effort? Just relative to the listener, or is there some overall masterpiece that comes together at that point? 2) My back living room upstairs is 12' X 22'; sunken; closed in on 3 sides with one of the long walls opening up in the middle to access up to the kitchen and rest of house. Having patio doors centered on the opposite long wall, I would think positioning the monitor (soon to be 36" direct view or 43-53" rear projector) in front of these patio doors ( NEVER use them anyway!) would be the best way to cut down direct glare onto monitor; coupled with window treatments to keep as much outside light out. Question here is; would I recieve better audio imaging and overall sound quality if the front of the system and monitor were along one of the 12' walls as opposed to the 22' wall? Would welcome and appreciate all comments/suggestions upon these issues!