I'm in a similar position to the OP.
Recently bought a 130i LE (which comes with runflats, 205/45 front, 225/40 back) and I'm looking to get non run flats, which for my wheels I'm told 215/40 front, 245/35 rear will be fine.
I don't really want to go wider than 215 at the front as I don't want to lose the good turn in the car has with a narrower tyres at the front.
They don't appear to do as2 in 215/40/18 so I too am looking at mitchelin super sports.
Are these a good tyre to get based on these sizes for dry and wet? And is the noise really that bad? (I'm coming from Goodyear eagle ntc5 runflats which aren't that noisy in my opinion).
Also, if I order from blackcircles (or elsewhere) will I have a problem with the garage swapping runflats for non runflats?
Thanks