I would say go with 19" my car is lowered on the stock 18's with the H&R Sport and I just bought some 19's to put on it.
As for the above wheels, I am not sure if the offset will allow fitment so its not a matter of width but more the offset you might rub the calipers but I am not sure. Only way to know for sure is to try but I have heard e90 wheels will not fit f30 because of offset.
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