All that power is for nought until you have a mechanical LSD installed. So I'd go with that first as well as stiffer sway bars to dial out your understeer, then suspension including lowering a bit further over stock M Sport.
Next look at your brakes. Either a BBK or the cheaper initial gains from ss lines, good fluid and better pads.
Bigger wheels is an expensive upgrade for the return against the items above. I would make wheels last on the list. Unless looking good is higher on your list.
|