Im looking at getting this tv the Sony XBR43X830C or the Samsung UN40JU6500 im going to be using it as a Pc monitor and i have a gtx970 to use one of them in 4K mode, how different it will be the 120Hz to the 60Hz when i set the resolution to 4k 60Hz if i run in 4K mode all the time will having the 120Hz not matter, and movie wise in 4K on my pc. i do game, edit videos 4K and 1080P and photos and use my pc a lot, watch movie here and there..