I've returned to the BMW world after a 7 year hiatus (prior BMW - 2001 BMW 330ci), and have just picked up a 2010 535i xdrive with M sport package as my second car for daily driving. The car looks hot, the BMW M 135 rims are nice, but come with pathetic little 245/40 run flats all around. I am looking for a set of staggered 19inch rims, and am leaning towards the Miro 346's. I'm going to mount them with Michelin Pilot sport A/S's. Any advice on whether they will fit my car or not? Will the Michelins fit as well? 245/35 in front, 275/30 in back I presume. What about Bremmer Kraft BR03's as seen on Tire Rack? Pics of these anyone? Best place to buy other rims? I definitely want to be able to use the BMW center caps. The X-drive is a serious limiting factor when upgrading rims!

Also, do I absolutely need to lower the car with H&R springs, or will the ride suffer terribly?

Thanks for any help here for this return newbie.

(I've also posted this in the classifieds as a WTB post, can PM me if preferred. I will not buy used)