It is pretty confusing, as is the whole 4K, UHD, HDR, DV, experience.
I may just stick with my Sherwood Newcastle for a while longer.
I did buy a Vizio M70-D3 and I can tell you about that particular TV....as I am on my third one, and am waiting for the fourth one to arrive (as an exchange from the Vizio folks...) My advice would probably be to either buy a Vizio E Series 70" (E70-E3) or wait another year. The M Series, although better on paper, seems to be plagued with issues. I tried to save some money and buy refurbished. The first one arrived with a smashed screen, the second one had debris in the screen. I finally bought a new one and the panel appears to have the diffusion layer delaminating. I'm waiting on a replacement from the Vizio company, and if it is not any better, I will buy the E.... I really wanted the best panel I could afford and the M has a 120 hz native panel with 64 LED dimming zones. The contrast is amazing. Blacks are REALLY black...and it does support HDR10 and Dolby Vision. I was a little leary of the SmartCast system, but I'm getting use to it, and it really ain't half bad. I see the logic in keeping the casting off-board. It might be future-proof, in that all the upgrades will happen on your device..ie cell phone or tablet..and not the set itself.
I considered and looked at all the major manufacturers sets...Samsung, Sony, LG....but their price is either sky high, or their panel is 60 hz..and the contrast isn't that great..
I previously had a lowly Vizio D650i-B2....and I think it is an amazing TV although it is 1080 and I really wanted to go 4K...
You might want to wait and get the 75 inch Vizio E Series...it has a retail under 2K.....but you can get the 70 incher for 999....and they recently upgraded the firmware to work with HDR....and I don't think it has the issues associated withe the M Series panels.. Hell, there is even going to be an 80 inch model....
A lot of folks are really happy with their Sammys.....so, I guess it is really all in the eye of the beholder..
Back to the pre/pro....I may have to wait for the Atmos technology to either trickle down some more, or try to get a used processor...I am not ready to spend the big bucks for a brand new processor.
I'll bet the Yamaha sounds awesome. How many speakers do you have in your system? How many "channels" are there? Are you running speakers above? How many does it take to get the "effect"? Thanks for all the information...I have always tried to be on the cutting edge....but man that line is getting really blurry.....can anybody say 4K player????