Good sounding head unit / NAV for car?

I have a Kenwood Excelon DVD/Garmin NAV unit that I've had for a couple of years now. I do like the sound a lot and am able to play up to 24/192 FLAC files as well. The 13 band EQ also allowed me to tame a big 60Hz hump in my bass. I'd highly recommend it.

" Since I am willing to spend, I'd rather get something newer, is easy to setup, and has all the features.  Are there any NAV or non-NAV units available that have more than decent quality of sound - something that stands out? "

When I was younger, I did quite a bit of work with car audio. A car is not a good environment for high end sound. Anything over Redbook is overkill, but its understandable that you want good sound. One solution would be to use your smartphone as a transport, and connect it to a AQ Dragonfly. Then you just plugin to an aux input on the head unit. I understand this isn't the right setup for everyone, but it may work for you. Its very low cost and if the transport in your current radio goes, it can be a good temp solution.

I am looking into the Kenwood and Pioneer NAV systems.  I am not planning on playing anything more than redbook or streaming Tidal.  

I have some portable daps that I can connect to phone, etc but I would like something all integrated instead of having to plug several things in at once, etc.  I don't like the sound of the factory system but one big benefit is that it is all integrated together and I don't have to fumble around with anything.