Mine....
Okay, where to start - I've done balls to the walls online research on 4k, specifically HDR, even more specifically, OLED HDR versus LED HDR for the past 3-4 months. The 4 top brands right now are Samsung KS9800 (US version, Full Array Local Dimming) or the KS 9500 (in UK & EU this is KS9500 and KS9000 respectively). The FALD sets are way more expensive and use not side LED illumination but a full backlight display. The KS9xxx are curved screen and use an anti reflective technology to reduce glare. The next Samsung down is a KS8000 - just as good without curve or anti-reflective glare.
Sony have a stupidly sized flagship only at 75" (X940D) and is FALD. It's little brother the X930D, is the better value option and again like Samsung's 2nd tier, uses side (or bottom) LED backlighting. It's got amazing picture processing due to Sony's excellent record of picture quality. But it's technically not HDR10 as it doesn't reach a specified brightness of 1000 nits over a specified area. It is still HDR capable though.
Panasonic's flagship is pretty awesome (and a tad more expensive than Samsung and Sony's 2nd tier TV's). It's got a honeycomb styled FALD set up and is off regular size available at 58" and 65"(the others do 55" and 65"). All three are very highly rated for picture quality, Standard def upscaling and motion processing with a lot of possibilities to the end users for fine tuning. The AV Forums seem to recommend hiring a professional to tune your TV once it's in.
The curve ball is LG. For now only LG offer the OLED option at a 'reasonable' price. Their lowest tier OLED HDR set is still more than any other above set (£2800). However it has astounding picture quality, processing, true black representation (due to the OLED) and exceptional contrast. It's not as bright as the others but the depth of black means it still meets premium ultra HD spec due to the contrast ratio.
I can't recall the response time but they all come in at 30-40ms+ with some downright bad. You'd need to check and even then the reported delay is contentious.
Currently you can only watch 'true' 4k HDR via a disc. Streamed content is still compressed so not actually the real thing, despite being far better than what is generally the norm. There are 2 UHD bl;u ray players from Samsung and Panasonic with the Panny one being far superior. These players also upscale HD discs to near 4k quality and they do it exceptionally well. They also (Panasonic especially) aim to replicate HDR in now HDR HD.
If money isn't an option, the LG sets are the no brainer. The OLED tech has improved so much it hurts. But they are so expensive. The downside of LED is the possibility of object halo's around bright objects on dark backgrounds or light bleed. The ones mentioned above are so top line they tend to be almost perfect but cinephiles may notice small details. I'm currently looking at the Panasonic as I can get it and the (ludicrously expensive £600) UHD player for the same price as the cheapest LG OLED, the LG55 B6 (with no 3D).
Oh, no Samsung in the HDR 2016 range does 3D.
If you have a budget the choices are truly annoying. If the LG B6 was £500 cheaper, I'd be all over it. The annoying things is at £2800 it's expensive but the 2nd top model , the E6 is 'only' £3500.
EDIT - Vizio isn't sold outside US so I can't comment but they fall down on motion processing I think (or is is standard def quality?).