I replaced my stock 18" M Sport wheels with BMW Performance Style 269 wheels. Got rid of the runflat tires (RFTs) while I was at it. Now running Hankook V12s Max Perf. Summer, 235/35/19 front, 265/30/19 rear. Rides a lot smoother and I have a better feel for the road.
The RFTs were rock hard - if you went into a turn aggressively, they would skip/stutter across the road surface. It's quite an unsettling feeling. These tires grip the road far better. I really love the difference. Of course, now I have to carry a spare with me.

Off topic - I had my car dyno'd the other day (Mustang MD250). BMW rates this engine for 300HP/300TQ at the crank. Mine dynoed at 280HP and 322TQ at the wheels! It pulls like a mother ...

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2011 BMW E92 335i: Le Mans Blue, M Sport, 6MT w/ CDV Mod, BMW Performance Exhaust + Style 269 19" Wheels

JIMP

And yeah, turbo engines are always underrated.

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2003 Acura 3.2CL Type-S MT
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