S02s
.... might be fine James. My experience has been RE040s, which are fairly durable but unbelievably twitchy over an uneven surface (eg a lot of country roads), and SO3s, which lasted 2000 miles (which included only one trackday), which isn't enough for me. That said, i may have had a bad set - if you speak to someone like Peter E, he has had a completely different experience i think.
Good luck