275/40/17 front and 315/35/17 rear. Superformance MkIII 40k miles
I've run Goodyear GS-D3s, Sumitomo HTR Z (believe this is the model) and Veredestein Ultrac Sessanta.
http://www.vredesteintire.com/products/SESSA.asp
I like the Goodyears the best, then the Sessantas and then the Sumitomos. All are good but the Goodyears shine over all and worth the price even though they are the most expensive. The Sumitomos are not in the same league as the other two but good tires for the price.
I've had all on road tracks and lots of road and rain experience.
I've run the Goodyears and the Sumitomos on my Audi '01 S4 and my analysis of the tires is the same.
Jim