Quoted from tp:

Funny thing, not so funny for me....
Last two samsung tvs I bought both broke in less than 4 years. Both developed a power supply issue and wouldn't power up. I replaced the power supply in the first one ($110) for the part. Went out again 2weeks later. Went out and bought a new one and here we are 3 1/2 years later and guess what.....same thing. Both big expensive tvs.for me, I'm done with samsung.
Bought a Sony this time. I'll let you know in 4 years if it's still working.
Also if you plan on doing any online gaming make sure you get one with low input lag (nothing to do with refresh rate) as most newer tvs suck when it comes to this feature. All that picture enhancing stuff really slows things down, and when your pushing buttons on your ps4 or Xbox and those things don't immediately happen you'll know you bought a tv with considerable input lag. Also remember just because a tv has a game mode, dosnt mean it's gonna have low Imput lag. Putting a tv in game mode lessens the picture quality and in some models dosnt even bring the input lag down to acceptable levels. Only a couple of models actually have low input lag, they can be found by googling (low input lag tv gaming). 30 ms or less under 20ms is the best.
When it comes to gaming, nothing does it better than plasma, except court tvs. What sucks is both of these have run their course and have gone the way of the dinasaur.