Very interesting thread! I am currently driving a 2019 M3 AWD, but have a MSLR on order with an EDD of next month (January 2022). I have considered all the pros and cons of the M3 and the MS and on balance prefer the MS - without considering the sound system. But, this thread shows that many folks prefer the M3 sound system. Which is a Big Deal for me. Am thinking of just keeping the M3 and adding the Unplugged Performance suspension to give it a better ride. Do, any of you have advice for me? I would add that i also currently own an MY. It is one of those rare Standard Range RWD ones that i snagged for cheap in January. But, it does have the premium sound system. That MY sound system is almost as good as the M3. And i think it is not quite as good because the shape of the interior means placement of rear speakers is different from M3 and also the distance from speakers to my ears is different. I found a thread on Reddit about this too. And, of course, since the MS is a hatchback and the M3 a sedan with a shelf over the trunk, the layout of MS and M3 are quite different as well.