[kk2002s]

Try using simple math as a guide.
Good long lasting all season passenger tire 60,000 miles
Typical base line for daily driver @ 12000 miles/year = 5 years to reach end of tire by mileage and close to time as well

How many of us are putting 12000 miles a year on their boxster at this point?
I did the first 2 years as my daily but now it is closer to 5-6k
so that = 10 years on a long wearing tire
So a good high perf summer gets around 25k (That is high end) so that = 4-5 years.
So you could take 5 years of expected driving, divide by expected miles/year and that will give you an idea of what type of tire to buy (And if cold/slippery weather is involved)
I run my summers year round but it is dry only driving and with caution and pretty limited