I'm waiting for the 976. I was waiting to upgrade my TV to a 4k, but my plasma failed. So I chose the one I did to be compatible with the 975 for now. At least that gives me some more time. I really wanted an HDR version, or even one with Dolby Vision, but that wasn't in the budget right now. The Vizio I got does have very good picture quality and that's what really matters to me.
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Main HT <> 976 <> 7200 <> Ultra-X12 <> sapphire ST2 mkII RF/LF <> sapphire SC center
sapphire ST2 mkII SBR/SBL <> sapphire SS SR/SL <> Verizon/DVR <> Vizio M70Q7 <> Oppo UDP-203 <> Amazon 4k Fire TV