We have 20's (214's) with non RFT, no AD. Ride is firm. Not all that dissimilar to my e46 M3 on OEM 19's. I'm fine with it as it does look great (IMO). Im a bit surprised my wife (the X5 is hers) is ok with it... Does that make me a poseur? Well, I'm ok with that too...

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'06 M3 Silver/Gray
'11 X5 35d Sparkling Bronze/Oyster
'88 M3 Silver/Black, 47k Miles, Stock, Garage Queen...