Fwiw Nick, I parted with my 224's because I thought they were a little too wide at the rear. It's a personal thing. They are a good looking wheel. It just bothered me a bit too much. I've seen plenty of photos of other peoples non ///M's with them on and they appear fine! I think 245 rear Tyres are the way to go though.
Overall it does update the pre facelift models. I'm currently going the other way and have a set of ellipsoids in for full refurb. They will be going on my facelift model with 15/20mm spacers front and rear.