I help test a ton of TVs for work. Sharp has the best screens these days, terrible TV UI though. LG has good screens and UI.
I would pick in this order:
1) Sharp
2) LG
3) Vizio
maybe Samsung if you can find a good deal.
After that might as well buy a budget brand....
I don't care for Panasonic or Philips.
I bought a Sharp LCD 1080p, 120 hertz 52 inch about 6 months ago from of all places, Dell, and LOVE it.