Our latest mod was the removal of the 10 year old Zenith surround sound system and installing a Samsung HW-J250 soundbar. I elected the 250 because of the size, about 3 inches smaller than the TV. I am on the plus side weight wise, the 250 is about half the weight of the Zenith and sounds MUCH better. One problem we had was with the sound adjusted to watch from the chairs, the rear speakers were too loud while sitting at the table (one of the rear effect speakers was directly above your head).
In doing this I eliminated the steel cover, removing about 10 pounds from the cabinet load. I had already replaced the TV with a Sony LED about 2 years ago (see prior posting above) so the last step was to replace the sound system. I cut a piece of 1/2" plywood added a piece of solid maple then stained it to match the interior decor. One thing I did different, was to bolt through the maple into the speaker, the stock wall mount could allow the speaker to bounce off the mounts. One thing I found the hard way, the Soundbar is from Samsung, that means metric parts. I tried a 8-30 screw, the Sounddbar is 4 -.7 mm.
The installation and connections went smoothly without any issues. I was able to grab the fiber optic output from the TV, so it works with our BlueRay player too. I picked up the outlet in the driver's side cabinet that is NOT controlled by the ignition switch so we can also use the Blue Tooth input to the Soundbar while we are driving down the road to play music from our iPhone.