@vthokie83 If you are building from scratch, you might want to specify good room dimensions. The research has been done, by the famous acoustician Cox. He found that about 2% or so of rooms are good, about a quarter are OK, and most were bad (published work on the basis of a large computer similation). Snake oil is out there - but so is the science. As Cox shows, inches count. Look it up.
I did it, and am I glad.