Samsungs are probably the best right now in LEDs. I have heard that they can be difficult to deal with in terms of customer service - don't know how true it is though. Last I heard, the flavor of the month for Plasma was Panasonic, but that was a year ago. Your best bet for a TV rec is to go visit one of the A/V forums and see what they're talking about.
AFAIK, LG is still the king of the "best bang for your buck" category - I saw a 55" LG LED in Walmart last week for 700 bucks.
