For the street I use 205/50R-15 Michelin Pilot Exalto PE2
great tire - pricey but good... hard corning will wear the edges...
I Rally and most racers are using the Toyo R888 - great tire but sucks at high speeds in water - serious hydroplaning... and we had alot of rain in the rally and MANY...
Spoon are truly great products... Well manufactured and tested... but everything they sell is overpriced... if you have the money then fine, but you can truly find other brands that will give you a equal quality for less money...