Jamie,
What's your advice in relation to run flat tyres? I like the idea of them in some ways but I'm currently running them on my SC430 and I'm convinced they definitely make the ride too firm (by Lexus standards anyway). I've seen some other members in the past have switched to normal tyres with supposedly good results. Are there any negatives to doing this aside from not having a spare? Also, is the foam stuff any good in emergencies? Obviously it won't be in a complete blow out....