i am exceeding all the us epa mileage estimates, city highway and combined ... the uk mileage estimates are wildly optimistic, but the us are realistic
as to options, first off, if you don't get it at build time, it will be VERY expensive if not impossible to add later! i am not speaking of mirror covers or strips, but things like the radio (std or HK), alarm system, connected, nav system
get into the configurator at MINIUSA.com
and carefully go through the options ... if you don't understand, ask a sales rep, that is their job!
you should be able to see most options at a dealer
there are several "must haves":
the HID headlights are far better than the stock halogens
heated seats, if you live in a cold climate
alarm system ... i passed thinking i could get a better, cheaper alarm in the aftermarket ... wrong! i can't even find an aftermarket alarm, let alone anyone willing to install one on a mini
strong personal opinion here, but i would not own a countryman without the sport suspension ... my sister has an all4 with stock suspension and it rolls like a boat in hard corners, yet it does not ride any better than my all4 with sport suspension
strong personal opinion here, but i would not own a countryman with the sunroof ... it adds 80 pounds to the top of the car, rattles all the time, is very noisy when open and sooner or later, every sunroof turns into a leak... my sister has the sunroof ... it sucks!