Got my new M3W 4 weeks ago, with spec as follows (for the record) - thanks all for their advice! Garage fit is fine and easier to get in than I expected. Need to fix the internal garage door to be fireproof now I have a real car in there though...
Taller roll hoops
Black exhaust shields
Front wheel spinners
Quilted leather
Heated seats
Union Jack enamel badges
PVC tonneau
Mods under consideration:
Rear mudguard (can't believe they have no rain or mud in Malvern!)
Fairbourne Aero Screen (for when not wearing a helmet at certain velocities)
Luggage rack (for 2-up touring next Summer)
Additional rear strap for the tonneau cover (the zip stopper flew off on first use so need something to replace that, and the zip looks like it might fight the paintwork over time)
Steering wheel extension (for that extra knee height)
Battery conditioner (in case there are extended bad weather periods - or work drags me away)...
Of course what I really want is a Vickers .303 and bead sight...