That was a great writeup, thanks for sharing.
I only spent 2 days from selling my previous F30, to researching 2016/2017 F30 CPOs, to test driving G20 330i, M340i, 330e, 228i GC, to grabbing my 330i that arrived at dealer with 5 miles.
Before that I was all set to pick up a Model 3, but Tesla had no car for me.
I also test drove C300 Sport, for some reason the G20 kinks were more appealing than C300 circular vents to me.
The 228i GC was promising, but it really was an expensive FWD Civic ....
The M340i was very cool, it just was a bit front heavy(200+lb extra over front axle), so it was not as sharp at curves than 330i.