Just bought an LG-55LM4600. Normally I drift toward the top on electronics but for $700 I figured what the heck. Picture is very good and sound is fine for TV speakers. I have not yet seen any evidence of 120 Hz and have read the HDMI will do it. Now I have RGB connection.
If I were to do this again I would get VIZIO M551d-A2R 55" 1080p 240Hz Razor LED