HI Dogwood:
Might as well just take out a gun and shoot yourself in the head right now!!! Less painfull than installing the TV..It is a royal PIA.
I am in the midst of it as we speak. I can tell you the smallest width of a new 32 in TV is the Sylvania LC320SLX.... 720 DPI... Kmart has them on sale $379.00 I measured about 10 different brands. Try and get speakers in the front, mine are on bottom, try and get variable output RCA Jacks to hook up your surround sound jacks, try and get a smaller mount that works, try and pull that 80 lb monster out the top by yourself and disconnect the wires at the same time. Save the old RCA jacks and canister from old TV, take off back and disconnect from speakers, just in case you have to reuse them on your new setup if you can't get your surround sound to work correctly.
The Sylvania will fit INSIDE your wooden molding from your old Sony setup if it the same as mine. The width of the TV is 29.75 inches wide. Smallest I ever seen.
I am replacing both the front and the bedroom TV in my 2004 Itasca Meridan 36G.
Search here there are many differnt ways of doing it. I am going the oak plywood and angle iron mounting route. You can find the Sanus TV wall mount at Wall Mart $59.00 fits 13 to 32 in TV's.
I purchased another mount on line, to big, to heavy, didn't like the setup. Make sure you look at the mount you want to use and how it applys on how you intend to mount the TV braket inside the steel cage.
Good Luck..... I only have about two full days invested so far, not even half way done.
Jim P.