Good points, Apex.
I thought the E90 M3s had fixed calipers like the newer 1/2/3/4 M Sport brakes from Brembo. If I'm wrong on that front, I agree, not much of an upgrade.
I almost certainly don't need upgraded brakes, regardless - I just like 'em.
I'll probably settle on just uprated pads/lines/fluid and call it done.
Thanks!
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