After seeing the closeups, I have to applaud again. Very nice job and it should be very inspirational to those members here who have some wood skills and tools.
For years I've been using a Kenwood branded A/V cabinet (upright) with the following in it: Yamaha Receiver, Sony CD Changer, Mitsubishi VCR, Sony DVD Player, and at one time... a DTV receiver. The front has hinged glass doors and the back has some panels covered, but the one where the receiver was/is had to be open because the Yamaha is too deep and has a gazillion wires.
Anyway, if I build my stand, I'm probably going to have glass doors in front and an open back. Dimensions I'm toying around with right now are about 55" wide, 20" deep, and 21" high using casters. I'm seriously thinking of using the 1¼" thick walnut sides of my Kenwood as the four upright panels and then doing something like you did with the ¾" plywood for top/bottom. Haven't decided whether to use a laminate top or just finish it. I've seen some brushed metal laminates that might be a nice transition for a top to the set, but that might be too glitzy. I have a pretty decent wood shop so I could easily build something.
I may go with the 62" Mits 725 which has some black trim so I could also use black laminate for the top... but birch stained with walnut also comes out pretty nice.
For those guys who are interested in building their own cabinets, or even organizing wiring, get yourself a Rockler Catalog by going to:http://www.rockler.com
They sell prefinished doors, hinges, wiring covers, casters, handles, legs, flexible real wood veneers, sliding trays, and a million other things that could be used. Heck, they even have plans for entertainment centers.