Hello
If you want stay with stock 17" measure, I recommend Continentel ContiSportContact 2 or Bridgestone Potenza RE050A. I Have in my
JCW the Continental Tires, I am very satisfied with them. Substantially better that the Pirelli Eufori@ RF. But I think the Bridgestone are the better Tire... my opinion.. like a prefer the stock measure (205\45\17)
The TireRack recommends for MINI 215\45\17 and in this measure you can get the GSD3 or the new Goodyear...
Best Regards