What are your system plans now? Between the 800 and the bit one I think the alpine is more appropriate for this car.
What I am doing in my car is removing the head unit, installing a custom blank plate that will also hold/charge my iphone. It's light, I can take it out and with the targa off not worry about theft, and I am not hacking up the car.
Makes sense. I figured I would locate the dock connector such that any recent piece of iStuff could be connected - all my music is on an iPod classic, the phone has Siri so you can talk to it while driving without looking down, and there are great nav apps for the 3G/4G iPads.
Definitely going to avoid hacking up the car though - all slicing and dicing will be done on aftermarket replacement bits with the OEM gear safely squirreled away in case I ever decide to put it back.
You can have a phone based system and be fully stealth... which has value on its own. That tesla panel is doing a lot of controls on the car. There is no way you can make that happen in an NSX.
I am an audiophile like you (well, a jaded one), my work is in this field, and my purpose was to come up with something LIGHT, to remove weight from the car not to add, and to have it sound great and be functional. That was challenging.