Sorta plain Jane here--
I got floor mats & the MFSW steering wheel on my Cooper.
As to what I would add--bonnet stripes (at least); spoiler; the soon to be available front/rear fog kit; and 16" wheels, in a 5 spoke pattern
Money no object, I'd go full boat Cooper (not S) 6 CD/every add on storage bit/aero kit/stay with 16" wheels/Sports Plus Package/sunroof, etc. then do the
JCW package. Of course, the
JCW Cooper package would have to be available in the US. Are you listening MINI?