I'm considering buying either one not sure which is better for a normally lit room (Apartment) room size is L19'x 11'L I have 2 questions. 1. Which is better( LG or Panasonic, any other brands to look at?)2. what would be the right screen size I'd be sitting about 6-7 ft away from TV. Thanks for your help.

Paradigm 800F,Paradigm C600,Axiom QS8 v3,Paradigm DSP-3100 Sub,AVR Anthem MRX-740