I would like some help with wheels sizes for my 330cd e46 , i currently have standard 17 inch wheels from bmw and would like to upgrade to some bbs wheels and i would like to know how big i can go on size and width without having to change suspension and without rolling arches and what is the best ET to have ( biggest dish ) without making the car awkward to drive. i have been looking at wheels but these issues stop me from buying any , any help would be much appreciated