Looking at them in the store I really can’t tell the difference in picture quality from different brands tho I am sure there is some.
It seems 4K is the next big thing but no one is broadcasting that yet. I bought a cheap ($139) 43 inch at WalMart and the picture is fine. The sound is pretty mediocre tho. It is 1080 dpi resolution too.
I noticed they will be selling a 40 inch 1080 during Black Friday for only $99.
Run the sound through your audio system, if you have one. The sound should be superb. Anything with Blu-ray will sound beautiful.