I just purchased a set of E36 M3 ltw wheels for my 89 M3 and I am curious as to what size tires people are using and what works best. I figured out the right side wall height and came up with a 215/40/17. I have heard of people using this size, as well as numerous others: 225/40/17, 235/40/17, 215/45/17. What is the "right" set up to maintain overall diameter and not have a horrible ride? Will the type or brand of tire make a difference in size? I am leaning towards Yokahamma AVS or 520. thank you.