45 frotn and 40s rear? What are your tire dimensions. Full dimensions. They should read ###/##/R##
A commonly used moderate setup is the H&R Sport Springs with Bilstein Sport shocks/struts.
A substitue for the Bilsteins are Koni Single Adjustable shocks/struts. The one stipulation here is that in the M3 the front struts are inserted into your factory strut housings.
You shouldnt rub with that setup. Some people recommend the Eibach Pro-Kit springs but I was never too fond of them.
1995 BMW M3 Turbo - Dakar/Black