My very techie DS said led sets have a teeny light behind every pixel while lcd sets are lit by larger lights behind the screen. You have to pay more $$$ for all those teeny lights but, oh kid, what a picture!

We had an expensive Samsung that lasted only 4 years...Now we have a 61" Sharp Aquos and it is amazing...had it for 2 years and we love it...we have a big den...LED is the way to go...much better picture...we looked at the 3D tv but wasn't impressed but I know that's the wave of the future...

I know it doesn't answer the question, but had to share - we have an old boxy, big heavy tv in our family room. Works just fine and we figure, anyone who looks in the window to see what they can steal, will pass us by, assuming we have nothing made past the 80's!
If they look really hard, they'll see a phone with a wire that goes into the wall too!

We ended up getting a new flat screen tv last year when we were in Walmart. The prices seemed so good, my husband couldn't resist. We didn't do our homework like we should have but were lucky to get a fairly knowledgable clerk and we have had good luck with the tv. That doesn't answer your question though.