Owner of a 2018 M240i Estoril Blue 8pd auto pp w standard sound system.
Estoril blue: absolutely stunning color, not hard to keep clean. I get constant compliments on it.
I'd only go for RWD because I want the fun factor. Inducing corner oversteer = fun
Standard sound system is @SS, I replaced with BavSound speakers and its much better.
I have had a few loaners with the HK sound system in them and its barely passable. The HK is still no winner.
I also have Dinan intake and tune which make the power even more crazy.