Currently I have a Klipsch KSW-15 sub that I really like. However I want to build a great sub that will reach deep and yet be VERY musical. I enjoy home theater but am highly critical with our music. I've seen sonitubes and box designs. What do the pro's think? BTW, I would buil two smaller if that would be better. While money is a consideration it really is not that big of an object to me (wife does not see this). Thanks for the help.