Long time Member, not a recent poster 
I need two TVs. One to replace a Sony that broke today and one new one.
Makes sense to get two of the same.
Looking at a Samsung 55 4K but have no idea where to begin really.
Always used to be a Sony person (2 previous 40 1080 TVs) but considering Samsung for first time.
So, do I want Samsung or another brand?
Sources:
SkyQ
Amazon Firestick
Xbox One
What else do I need to consider? Flat not curved I think.

I need two TVs. One to replace a Sony that broke today and one new one.
Makes sense to get two of the same.
Looking at a Samsung 55 4K but have no idea where to begin really.
Always used to be a Sony person (2 previous 40 1080 TVs) but considering Samsung for first time.
So, do I want Samsung or another brand?
Sources:
SkyQ
Amazon Firestick
Xbox One
What else do I need to consider? Flat not curved I think.