Hey all

So i just recently picked up a new used G37s coupe and am wanting to upgrade the stock Bose in the car.

I had a full blown extremely high end stereo installed in my previous car and still have all the equipment, speakers, amps etc., and I would love to install it in this car however at the same time I would like to keep stock navigation in the car as well for obvious reasons.

I have looked at the MS-8 however, from what I read, it doesn't seem i can further tweak the crossover points and maybe a few other things once the auto tune has been completed.

Is there any other true "quality" units out there that I can integrate in to the factory head unit that will perform on the same level as the Pioneer P99RS head unit and still have the same type of tuning flexibility before / after auto tuning?

If not is there a way that I could integrate a setup where I can add my Pioneer to the car as my primary source of music while not loosing certain features such as having the music dim for voice commands, the navigation which updates me with driving directions & traffic info, Bluetooth & microphone, etc

Integrating something with excellent sound quality is a must, preferably without having to buy a new source but am willing to do what it takes to get "that sound"

Thank you guys for your input!