Willd, thanks for answering my questions. I haven't been this excited by HT since I was doing research for my front projector. Currently my screen (110" diag) is much bigger than my sound. My Paradigm sub is nearly worthless in my 5,000^3 ft basement.
Just found a full woodworking shop I can use for the build. I have read the threads contrasting MDF and furniture grade plywood. Cost is a big difference, probably will stick to MDF and wrap w/ veneer.
Look forward to getting started on this project. Thanks to all who have posted comments on the sealed Mal-X designs.