I just found out about a company that could probably help you: Auralex at www.truesoundcontrol.com. They offer free room analysis and recommendations (existing and unconstructed)as well as products. I'm going to give them a try. Good luck.
Audio room dimensions
I have and area in my basement where I'm going to build my audio room and have a couple of options. The easiest by far is to build the room to 12'9" by about 16' perhaps a few inches less on the 16. Or, 12'9" by about 19'. The latter will require I do some serious surgery to the area at the bottom of the stairs where the door at the bottom of the basement is. My question is: will the smaller room seriously compromise the sound vs. the larger room? The finished ceiling height will be about 7'. Thanks.