I am not too worried about the style, although the 19s would probably look better after the current 20's.
The 19's however are for the E70 but having read a few posts on this wonderful site, it looks like the purchase of some rings will make it all work well. The 18's seem the sensible choice though I have wondered why no one has put a bid in and they have just been relisted - again.
Your help is appreciated

http://www.ebay.co.uk/itm/271541682771? ... 1426.l2649
http://www.ebay.co.uk/itm/191243962748? ... 1423.l2649