Quantity vs Quality

[The_Donster]

OK, up much later than I should be but this has been driving me nuts. I was originally looking at picking up a 70-75" screened television. Unfortunately I had to take some time off and in that time it seems that most 70-75" dried up within my budget of $2500. I was originally looking at the M70/75 and the Sony and Samsung equivalent. Now it seems if I want to stay within that budget or below, I have to step down to a 65". Right now the contenders are the Vizio P65, Sony 850D & Samsung KS8000. So I'm wondering if I should settle on a smaller screen size or if there is a equivalent 4K television in the larger screen sizes I want within my budget? I'd be using this for gaming, streaming and watching BD's.