replace HT receiver with newer H/T 4K receiver


 Setting up a H/T room after moving in to new house and want to  replace Denon 5308CI  receiver  to newer receiver or seperates with 4K capabilities.   Have  65" LG QLED,    Martin Logan Edge in-wall  L,C,R speakers and M/L ceiling speakers, with  2 older SuperCube II subs. Room is roughly  20' x 30'. Budget is $4,000 or so. This room is strictly H/T. Have  separate equipment for music. Suggestions greatly appeciated.
panheadscooty
I would post this question over at AVForums where you're far more likely to get good responses. Mostly a 2-channel community here.
For receivers, two options to look at would be Anthem MRX1120 for highest resolution and detail.  Or look at Marantz SR8012 for a more warm sound with excellent sound quality. 

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Ultimately, separates are a lot better, it is going to be hard to get a good sound quality HT Processor that also supports 4K.   You could try looking at a Marantz AV7705 (or previous generation AV7702) and the fine a nice 5-channel amp.
@helomaech - are you trying to chase away new users here?  We have a pretty good set of HT users.  Even though most of the users are 2-channel and only post in the "Amps Preamps" thread.