I am totally lost here, I have a 95 325i convertible and am trying to order new shocks and struts all around. First of all can anyone tell me the difference between touring, sport, and heavy duty Bilsteins. Second of all, I am planning on getting some 17' FM replicas #44 and low profile tires, and wondering how that will effect my suspension. Also, I saw some monroe shocks and struts and advance auto parts that were a lot cheaper, but was told not to go cheap on suspension. Any suggestions???