I know my opinion may not amount to much, but I've dealt with A/V equipment for years and have now perfected my own home theatre.
As for your LG TV, take it back. LG's are sh!t from a quality standpoint and for the money, there are better TV's to be had. You may wanna stay away from Vizio as well. In the simpliest terms, they use whatever components are available to them (whatever is cheaper) at the time. What I mean by that is you could go to Best Buy and buy two (2) same model Vizios and more than likely, they will both have different components. As for the quote below...
A 1080p LED/LCD TV is fully compatible with a 720p or 1080i signal. So regardless of the transmission by the provider, you should still get a video signal and not just the audio track. Even the tech specs on LG's website confirms this.
Take it back and get you a Sharp Quattron. They cost a little more, but are well worth it picture and quality wise.
Here's a fairly new review of the Sharp Quattron from Gizmodo.
60 inch Sharp Quattron
Sony BDP S360 Blu-ray Player
Sony STR-DH740 7.2 Channel 4K Receiver
Infinity (Various) Surround Sound speakers
Definitive Technology SuperCube 4000 Sub
Edited by WARDS, 22 August 2014 - 08:24 AM.