Tully,
I just replaced my old TV with a 32" LCD Sony Bravia HD. My cabinet width was 31 1/4". The flat screen TV was 31" exactly. After we stuck on the little rubber cushions it was a perfect fit. We cut out some 3/4" plywood L shaped blocks, screwed them to the cabinet and the TV just sat down perfectly.
We tested it this past weekend driving from Houma, LA to Houston via I-10. If you are not familiar with that stretch of road it is the roughest in the nation. The TV stayed in the cabinet so I guess it passed the test.
The key is finding the correct width TV for your cabinet opening; all of the sets out there are different sizes. Just bring a tape measure with you when you go shopping. Good luck
Tuga & Karen Gaidry
2012 Honda Pilot