As others have already mentioned - the radio on the Z is pretty bad. The good news is, if you have the regular HU and not the navigation; then you can easily do a double din radio that offers things such as Apple CarPlay or Android CarPlay - regardless the aftermarket is the way to go. Now if you have your navigation built in - (this is my case with my current Z); then the best thing to do is stream your music from your phone and keep it charging - while it doesn’t compare to having an aftermarket HU - I feel it helps and I use the phone holder that utilizes disc so its out of the way and allows for me to charge it through the center console.
As for the road noise - oh yeah, these cars have a lot of it - i believe a lot of members have looked to DynaMat the trunk and some of the other areas of the car to lessen the road noise but I hear it adds some weight to the car. Regardless - sounds like you are enjoying the car and yeah, they are great and balanced cars.
