I have one, only thing tempting me out of it is an M6. Standard car is great but once you ditch the runflats the suspension feels soft, so a nice Bilstein kit will sort that. Mine has:
Bilstein B12
Quaife LSD
Pagid RS29 pads
Catless downpipes
Stage 2 map (400hp / 408 ftlb)
In a straight line theres not much that copes with it except the M5/M6. I am yet to find the handling limit of the car as I run out of talent long before the chassis. I can drive this a LOT faster in the wet than my ED30 without any scary moments and the only issue on a recent trackday was oil temps.