Just to let you know,i have just fitted a set of Speedline Marmora 18x8 et54 wheels with 225-40 Avon tyres on my JCW,they fit with no problems,close but clear.
Not sure if I like those, but they are very different, gives you a unique look.I have these on mine
Fifteen52 turbo macs 17x8 et35
Personally I love them plus I'm one of only a few with them.
Now, I really like those, and SS tyres too, must have loads of grip !!I have Speedline Marmora 18x8 ET45 Alloy Wheels (finished in Ice White) fitted with Michelin Pilot Super Sport 205/40/18 Tyres
I'm sure they will not fit the JCW brakes.Konig Oversteer 17X8 et45 with Goodyear Eagle F1 summer tires 215/45X17
It'll look better when I get the red calipers. Still trying to decide if I'm going with the NM springs or JCW Pro coil overs.