I agree Carlos , the Corsa System are a good compromise between track and street use ...like the real corsa : on the track the system are good but not perfect . (like Michelin cup)
But remember that the Michelin on the wet are very dangerous ....plus that the corsa ...I used with my former 996 a max speed 120/150 km/h but the president of Porsche club Italia testes the Pirelli Corsa in street with a speed superior of 200 km/h ..he told us that the car (993 TT 430 hp) was perfect .
with corsa sistem you can use the car on the wet without problems .
I used the car with Corsa System on the snow ...max speed 15 km/h ahahaha!!!