Has anyone done this? Michelin pilot sports are available in this size and cost about the same as the CS3 in 215/45R17
http://www.camskill.co.uk/products.php?plid=m54b1535s16p60366&rs=gb
http://www.camskill.co.uk/products.php?plid=m54b1535s16p60366&rs=gb