Any fellow fanatics have an opinion about 17" or 18" wheels on a 2001 325i sedan? I like the 17" - M68 Style....which i can get in both sizes in replica versions. I just wonder if the 18" would be too overwhelming for a sedan? Also, what about ride....18" = less tire = harsher bumps???

Well, 18 are what come on a M3. They do provide better cornering. The ride will be bumpier. But it will also be crisper. you will hit a bump, jolt and be done with it. The 18s look better in my opinion. I am actually trying to find OEM M68 18" wheels for my 330CI. $4k is a but much, so if oyu get teh replicas please tell me what brand or company you got and tell me how you like them. Beware that some replicas have been known to shake at higher speeds.