The Samsung is a UN65F8000.
the Others are 2011 or earlier, so yes they are quite a bit older. But finding any brand that beat that f8000 screen for the price point simply didn't happen.
I'm not going to dump on another man's TV choice, because I wouldn't want it done to me. That said, for picture quality (and isn't this what makes a great TV?) I would never knowingly choose an edge-lit LED backlit model for backlight uniformity. If LED-LCD is your thing, and if the best picture is your goal, you've gotta go for a FALD (full-array local dimming). That's why I mentioned the Sony 900B 2013 set upthread. It calibrates easily and accurately to Rec 709, with spot-on color and black levels that an edge-lit LED set can't touch.
The Smart Hub of Samsung TV's is notorious for being difficult to use (S-Voice thinking ppl in the room are talking to it, for example) and is certainly not the best of the crop. Their Smart Evolution Kit is a good idea that one of my co-workers uses for his 4K Samsung TV, one that I hope others take a cue from. The audio coming from your downward firing 1" drivers, and 20W of
total skull-crushing system power [sarcasm mode off] all but insures you'll need outboard sound. I'm lucky with my Pioneer Elite PDP that it was bought just before the crazy race began towards ever-thinner HDTVs, because Pioneer provided these very thoughtful side-mounted 3" speakers which aim out into the room like speakers should (to be heard clearly), decent 36W for the stereo pair, plus a built-in subwoofer amplifier to plug a dedicated sub into the TV.
I get all the smart features I can use with my AppleTV, and Playstations 3 and 4! Heck, even the DirecTV Genie offers up Youtube and Pandora!
The picture quality of my Elite is only now being surpassed by the new crop of OLED HDTVs. Samsung offered one last year but bizarrely pulled out of that tech, leaving LG alone to offer their 55EC9300 set. It truly offers the best of both tech worlds:
1. The deep black levels that other emissive displays like CRT and plasma TVs offer
2. The bright, true white output of LED TVs
3. The wide viewing angles of CRT and plasma
4. The natural motion processing of CRTs and plasma
5. The thin, energy-efficient design of LED TVs
The only downside so far I've seen has been the curved design of the set. Although it's gentle and I would probably learn to look past it, I don't prefer it.