Michelin makes fine runflats.

Why do people assume that all runflats are horrible?

Anyway...not many choices in that size, hence that is the reason BMW gives you summer tires.

One big comment: GET THE CAR ALIGNED. Poor wear is an alignment issue. DO NOT assume BMW does it right or that they do it after a CPO (they dont) You want "MINIMUM TOE", like 0.01 to 0.02" per tire. Just going with what the dealer says will give you a sub optimal alignment- no matter which tire you buy

Oh, get that rim measured for run out before they mount the new tire....