Nice write up! You definitely chose the right 3 series for your upgrade. My M340i xDrive is primarily for the wife but I've been driving it to work (hospital) during the quarantine and have come to learn how massively impressive this car is. It's not perfect but it is quite a joy to drive. And the POWER. It's stupid fast really.
I came out of an E92 M3 and here is my write up from that overlap.
https://g20.bimmerpost.com/forums/sh....php?t=1651973
Currently our SQ5 is my primary driver but lease ending soon and looking to pick up an X3M.
Enjoy the new ride!