I cannot pick what direction to go in, I am a fan of the group 2 wide arches and would like to fit some to my mini. I prefer it when the arches are filled by the wheels… But I have to use this car on a daily basis to drive mainly on a-roads and the occasional motorway journey and have heard that 13’s are uncomfortable and you get bump steer… thoughts please!
I would go 12x5 and fit standard group 2 arches. Still get that look, but no worries about your wheel bearings or ride.
Or go 12x6 for a compromise, they fill the group 2 races and give that wide look, but don’t give as harsh a ride as 13s
Nothing wrong with a good set of 13X7s 
12x5.5s
fill standard arches nicely and give a nice ride
