Since you have Lci and xdrive it limits your tyre sizes to pretty much the 235/265 combo or 225/255 combo. The front is bolt on fitting, but As Nitrous Garage said rear needs fender roll and added camber and you can fit these. The narrower tyre combo would make the fitting easier. Also with narrower tyres i would use 10mm spacer at front to match the rear better.
This one is 19x10 et15 pre-lci (et25 on lci equals et17 on pre-lci) and 265/30/19, but Falkens which run narrower than other brands.
http://www.e90post.com/forums/showpo...&postcount=434
This one has the look that you would get, if you would add 10mm spacer to front. Don't know tyre sizes tho wheels are 19x9 et25 and 19x10 et15
http://www.e90post.com/forums/showpo...48&postcount=1