I think you'll be happy with an LG. This is my first LCD but I can't imagine a tv any better or with as many features for the price that I paid for my 47LD520. And once you correctly calibrate it.... my oh my
Does LK520 use IPS-Alpha panel? or would I have to buy a top-end LED model for that?
Also, I've heard LG uses S-IPS as their main panel tech. Never heard of LG using IPS-Alpha panels.
The problem I encountered with my 2010 LD series is that the CMS controls for primaries don't adjust 'right' when using 100% color windows. However, if a 75% saturation window is used, the color and tint adjustments behave as they should.
Here is a very good post that describes adjusting CMS using 75% saturations:
Using this approach, I was able to make CMS adjustments that improved my primaries, where previously (using 100% color) my adjustments always made the deltaE's worse.
Be sure to grab the calibration aid spreadsheet that's linked in the thread - it's very handy.
32LD450 proper saturation.chc.zip 7.6376953125k . file
32LD450 i1 LT.chc.zip 6.130859375k . file