The one thing I am afraid of is hydoplaning. The tires that came on my S2K were Potenza S02's. These tires are great, but they wear down to quick and then you are going to have water displacement problems with the low tread. The UTG was 140. So, I started searching for a good all season performance tires.
If you wanted a tire that has good wet handling characteristics, long tread life, go for the Yokohama Paradas. The performance is decent and the UTG is 300. I have some in the front of my car 215/40/18.
The Paradas were great, but i wanted to go a step up on the performance gauge. So, I threw some 245/35/18 Toyo Proxes T1-S in the rear of my car. I can tell you right now, that these are the stickies tire with a high UTG rating (280). I highly reccomend these tires.