I have the last of the supercharged Cooper S's, an '06 with about 50k with 2 sets of wheels (summer/winter, non-run flats). She's still very buttoned down and tight - no rattles. Most fun car I ever owned and I have no intentions to let her go or "up-grade." Driven the 2nd gen, turbo models extensively and while its a great car too, it feels... well more like a normal car... not quite as "raw" or go cart-like as the 1st gen does.
Took a very spirited ride (as a passenger) back from NYC IMS in my buddies Abarth. Seems like an awesome car too. I was uneasy at the pace - guess passengers always feel that way - but the car could hold its own no problem. Only thing that felt weird was the seat/car height somehow... felt tallish which gave a sort of "tippy" sensation vs a Mini, but then again, it could just be the passenger thing.
Lateral G Junkie