Whoa, those don't even have prices, but are no more than 1.5" thickness. An air gap is needed for even a 2" panel to be even remotely effective.
@MobiusMu ^ that would be an example of why sites like this exist. in 2016, we do have a pretty good understanding of how humans perceive, and prefer, sound. But there's a lot of white paper reading to do to get there, not to mention needing to learn HTML to launch a website to sell your snake oil ;-)
Use one of the smaller rooms and build an awesome stereo 2.2 man cave!