I'm a LG fan all the way. I have the LW6500 I bought last year and I got the LM7600 as well. They are the best TVs I have used and great for viewing night/day. I highly recommend the Lm7600. But out of the TV you wrote, the St50 does seem like a great TV after reading CNET's review.
I'm looking for a new 55" HDTV. I've got it down to a choice between the Samsung UN55ES6100 LED or the Panasonic TC-P55ST50 Plasma. My room gets some light but not a great deal as a covered rear porch blocks most direct sunlight. I'm not a big gamer and will mainly be using the tv for sports and general tv viewing. Which is the better choice and why?