Nope. Not a stock Boxster tire that I know of. Here is the Tirerack survey of similar max performance tires:
http://www.tirerack.com/tires/surveyresults/surveydisplay.jsp?type=MP
The Yoko AVS is ranked 12th. A mid-pack tire. Not bad...not so great. If best bang for the buck is important to you look at the podium finishers (top 3 rated). Most Boxsters are probably running one of the top five street tires listed here. My personal choice is the Michelin PS2 but I may explore another choice next time. Good luck.