Get the Samsung UN65HU8550.
It is bigger (65") but it is MUCH better than the others. It costs a bit more but it is worth it. Consumer Reports just rated it at the very top of its ratings.
I got one last May. I am STILL blown away by the spectacular quality of the picture. It is a 4K TV and the upconversion to 4K is truly astounding, even on SD input. Native 4K, like "Breaking Bad" on Netflix, is really, really REAL. The 3D effects from 3D sources are even superior to the high frame rate iMax 3D in theaters (I could actually follow the action in the escape downstream from the elves' prison in "The Hobbit: The Desolation of Smaug"), and it is even able to synthesize 3D in a way that is almost believable.
It costs more, sure, but it's actually worth it. Trust me here. You're buying something to last you 15 years or more. You will be really SATISFIED with this!
(And don't fall for the siren song of the "curved" displays. They are actually inferior. This is a proper flat screen.)