I have replaced three old crt televisions with lcd flat-screens, and have had no problems yet. Just mount solid so that the tv itself does not bang against anything, driving and road vibration has been no problem. Impacts hard enough to jolt other things, and break things off walls are of some concern. Usually the tv is the least of concern in that case. I have used two Visios, and one no-name offbrand. All are still working well. Worry more about your microwave than the tvs
For cost, go with the best deal, you probably don't need all the expensive options, and if something does go wrong, then much less expensive to replace.
Big advantage is that the flatscreens are much lighter, easier to provide good support for, use a lot less power, give a much enhanced picture, and will receive the OTA digital signals. The reduced weight means that they are much less affected by vibration and bumps, as there is not as much really heavy stuff to jolt. Just as long as it is firmly secured.
Noel and Betty Johnson (and Harry)2005 GulfStream Ultra Supreme, 1 Old grouch, 1 wonderful wife, and two silly poodles.