Well there are other issues with the avr, it only has one sub output and there is a handshake issue between that receiver my PS4 and the TV so unless I like the screen blacking out every couple seconds I have to Output the audio on my PS4 through an optical cable and Route the HDMI straight to the TV so I am even losing out on the HDMI audio quality.
I am planning on getting a 4K HDR TV for that room also and a 4K Blu-ray player. My girlfriend is much more into video quality so that would make her happy. It would be nice to have something that at least has 4k pass through and supports the new HD audio formats at least dts-hd.
With that being said should still just get a better sub and wait on the rest?
Also I am happy to report she doesn't wear earrings