My Head Office had. 52 plate Cooper with Chilli pack from new & only sold it last year. Was a great car and like a go-cart to drive. However, choose your wheels carefully as lower profile ones that came with the chilli pack made it a bone shaker. Don't know what the latest versions are like but something to be mindful of.
Yes, the 16" wheels or 17" with adjustable suspension (only £375) seem, from the magazines, to be the way to go.
VERY careful & controlled use of the options list also seems essential, but the way that "package" features means that some you can't have without others...!!