I live in Dracut Ma, no too far away from you and my Mother in Law lives in Littleton next to you.
I got a 335M RWD, I done EURO delivery
RWD drives aways different than AWD, I had other two RWD which with snow tires were FUN on snow, I never got stuck, in the other hand I had 1 2007 335XI and its suspension suck big time + you could feel those 300hp pulling the steering under hard acceleration.
Solution, do what I did, build yours and don't forget to add M-Sport
Sunday morning im always in Littleton PM