Very nice Albany, looks like you have thought it through for the Home theatre. In my plan, I have a raised floor with steps to the back of the room, added a ceiling power point for the projector. Plan to get speaker cables, HDMI layed during construction. I will get the walls painted a dark plum color and use remote controlled dimming for use with my side spotlights, see here: http://updates.clipsal.com/ClipsalOnline/Files/Brochures/W0000819.pdf
I have already bought my Epson HD projector and tossing up between motorized or fixed screen still. Will be getting my Axiom speakers from Canada.
Hopefully have mine similar to this one minus the star lights and bulkheads down the middle & sides.