May I know, if I need a 48" TV, that is to work with the DVB T2, and and Android media box, do the "Full HD Internet TV" range and the the "Basic" range make any difference to me? No playing game, just to watch TV, movies, ect.
http://www.sony.com.sg/microsite/sonydays/bravia.html
Few things to consider:
1) What are the native resolution of your contents?
Are they in 1080p HD?
2) What is your prefer TV size according to the place
or room you want to install.
Your source resolution is very important, if they are not
in 1080p than even a HD ready TV is sufficient.
You don't wish to buy a TV but end up with poor image
or bloated pixel due to your source not TV.

