How many autox events per year, how many runs per event? I get about 130 good runs out of mine before they fall off, I don't put many Street miles on them, maybe 3k-4k max, but with less camber you'll get more edge wear and less tire life. They're loud on the street compared to say stock tires but livable for 5k/year imho.
S04 won't be much better than the Michelin primacy tire.
I'd pick 225 but I don't like pinched tires.
https://m.tirerack.com/tires/tests/t...y.jsp?ttid=239