What are you looking to do??
If building and soundproofing and design go to the
www.avscience.com site and then scroll down to "home theater builder". Ask questions and search and look in the gallery.
There are literally thousands of picutres of every phase of building and design.
As John said avinteriors has good designs but the products they use??
Av Interiors just put out a 'living the electronic life" magazine with 16 very high end home theaters in it. Again most are gotty but you can get some ideas.
www.audiovideointeriors.comPlus any of the major home theater mags at your nearest Barnes and Noble etc.
Also don't forget going the home theater store in your area. You can get some ideas but most don't have their rooms sonically correct. It is amazing how bad some $50,000 to $100,000 rooms can sound!!!!!!!!!!!!
Larry