I have driven SS 1LE's with the following tires on the street: OE SC3, Michelin 4s, Michelin PSS and Conti ECS.
While the OE SC3 is a great tire that punches way above its weight for track use, it's wet and cold use limits most people. A great tire for dry and warm/hot weather street fun for sure. So most look for alternatives to it. Seems the 4S is the go to choice, but not for me. I drove my buddy's SS 1LE with the OE SC3, Conti ECS and 4S. I hated what the 4S did to the great steering feel/feedback of the SS 1LE. A softer sidewall vs the SC3 and lazier on response. That was a deal breaker for me when I wanted to look for a set of long road trip tires for my SS 1LE. I went with the Michelin Pilot Super Sport in the BMW "Star" application (#80913) for the front and the Ferrari "K3" application (#48442) for the rear.
I could not be any happier. Sure the 4S might have better rain performance but I don't think it's gonna be that much different to matter. FWIW, I didn't think I was gonna die when driving in the rain on the SC3's. If you would rather have a softer ride, then choose the 4S. For me, I don't care to give up any feel of the OE SC3/SS 1LE dynamics. IMO, the PSS felt a touch stiffer actually. Now the PSS will not have as good ultimate grip as the SC3 but for the street it has plenty. The first trip to the Smokey Mtns on those tires was perfection. Steering feel and response was perfect.
