You will save a LOT of money if you go for some nice aftermarket wheels. They'll be lighter too.
Save money, buy aftermarket wheels, and don't buy run flat tires.
In terms of ride comfort:
19" wheels + non-RFTs = 19" wheels + RFTs
...at least that was my case when I upgraded.
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Past: '08 E92 335i|ZPP|ZSP|6AT
Past: '15 Mustang GT|401A|PP|6MT
Current: '20 Shelby GT350|6MT
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