My professional (former computer engineer and photographer) and personal opinion is that Samsung LED HDTV is a better choice. They have a superior image (black retention) and stay trouble-free and out of the repair shop far longer. I'd also advise looking at Sony, as well.
Don't misunderstand. I think Sharp Aquos are good, but dependability-wise and picturewise Samsung is superior. In a showroom, there is no guarantee they are calibrated accurately. I use my eyes..and compare the 2 units back-to-back and make sure that each that you compare are same size.
Once more, be sure to include Sony in your search too. Try to ignore price differences of $100-$200. Many times as you like to bitstream on the 'Net, Samsung and Sony are superior at Net access. '
Also understand that with LED technology (as opposed to LCD), youll save a lot of money annually in electrical costs. Another benefit is that even with the 55" or 60" screens, LED tech is cheap to run and has incredible cool running. Movies and sports look amazing with lights low or off completely. Go for 120 Hz refresh rate. Most models in this category are enabled with that these days.
In fact, some are 240 Hz ratea. However, what many aren't aware of is that the built-in computer and it's software are superior in Sony and Samsung.