M Adaptive suspension doesn't offer significant benefits. It's a lot better than static suspension - especially in Sport mode - but otherwise not very inspiring. Dinan Shockware addresses many gaps but can be quite stiff in Sport mode.
BMW should have at least considered GM's Magnetic Ride Control technology but did not. GM's MRC is much better than BMW's M Adaptive technology.
In 2009, Beijing West Industries Co., Ltd. acquired the Chassis Division of Delphi Corporation. MRC technology has been used in Lamborghini and Ferrari vehicles, not just GM.
My suggestion would be to get the car which meets all your needs without M Adaptive suspension and then install coilovers from Ohlins, KW, or Bilstein.
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