If you haven’t already you can read my review here
https://g30.bimmerpost.com/forums/sh....php?t=2010730
Same route as you upgrading from a pre LCI 540 xdrive
I was more than happy with the 540 but the m550 is a very nice upgrade
The engine is amazing , smooth and refined and surprisingly economical if desired
Suspension amaizing when you consider what it has to do
Idrive 6 I thought was very good, idrive 7 is cosmetically nicer and the layout is different but you very quickly get the hand of it
All in all a very high class product
Only thing I’m starting to miss is now is the new car smell which is lsyarting to disappear!