I am currently building my house, and I am looking into what speaker options would be the best fit for my living room. I currently have a Sony receiver, forgot the model, and 2 Cerwyn Vega floor speakers, w/ 10"woofers. My questions are, in a room that measures 21' 5 1/2" by 15' 9", what would be the optimal speaker locations,(height etc) and is it better to go with "in wall" speakers vs. "cubes" for surround sound, and what brands are worth their money. I have been out of the stereo market for a long time, and need some drastic catching up. Thanks for the input.