I've gone MC to E92M3. I don't regret it, as above the M3 is the more accomplished car but a bit less special in standard form.
It's not a car you drive for 5 mins and think wow and after swapping I worried that it felt a bit cumbersome and refined in comparison but as I began to unravel the layers I soon realised it was the car I was going to be happier with. The chassis is another level and noise can be increased very easily and sharpening them up to competition spec is relatively easy.
I wouldn't have another MC without coiliver suspension but that's been well discussed on here. I would, however, like to have an MR alongside the M3.
Here's my before and after


It's not a car you drive for 5 mins and think wow and after swapping I worried that it felt a bit cumbersome and refined in comparison but as I began to unravel the layers I soon realised it was the car I was going to be happier with. The chassis is another level and noise can be increased very easily and sharpening them up to competition spec is relatively easy.
I wouldn't have another MC without coiliver suspension but that's been well discussed on here. I would, however, like to have an MR alongside the M3.
Here's my before and after

