I might suggest you take a visit to the AVS Forum site. They too have some debates but also some reviews of TVs.
Things I might consider -
1) quality of upconversion to 4k from 1080p (or should that be left to another device like a player, streamer etc.)
2) actual image quality (contrast range, quality of blacks, etc.)
3) type of hardware - LED, OLED, etc.
4) cost vs longevity (might settle for a better 1080p and get a 4k TV when quality improves and more content later)
I admit I am in the plasma camp and love my plasma 1080p. However, 4K is becoming more widely available yet the
quality is still not quite there for all around use. I would consider investigating LG and Visio (yes, might sound funny
but they are leading on many front of 4k technology).
I am always stunned of how easily I recommend vizio these days. No one else offers FALD at their price points. Between their sounds bars and TVs they have to be killing the competition.
Granted I do see samsung's fly off the shelves too.