The reason for so much hate on LG right now with videophiles is the massive downslide in PQ in going from 2011 to 2012. The highest end LG notwithstanding, LG put all their R&D into making the bezels looking good for 2012 and not so much into their screens. Grab an equivalent 2011 model LG LCD and compare against it's 2012 successor and you'll see the increase in glare, flashlighting, poor black levels, and backlight bleed. Hopefully the 2013 models rectify this.
One more thing... On the 47" models you're almost guaranteed to get a high quality IPS LG screen, but on the 50" size, especially on the lower price sets, you might end up with a losing ticket on the 'LG Screen Lottery' and end up with a Chinese MVA/PVA panel.
When looking at the TV, is there any way to tell the exact panel make/model? Just curious.