Please help choosing a 20-22 inches TV/DVD combo

I bought a couple (actually 1 with DVD and 3 without) of 24" LED Insignias from Best Buy that work ok. Angle of view is so so, as is case with most of the cheaper sets. The worst complaint I have seen has been sound volume however it is more that adequate for my TT. I did put one on my patio at home and that is the only time that the low volume is noticeable. Was a good replacement in my TT as I was able to utilize the existing 12 volt plug and it fit exactly the area I needed, made for a cleaner and easier installation. You can get them on sale fairly regularly usually the best price is when they run them as their deal of the day. A couple of days back they had the larger 28" w/DVD on sale for $149. I think their next size down from the 24" was a 19".