Does anyone have experience with these tires? New for 2016, though I think they're just rebranded Potenza RE003 for the North American market, and they seem to have some very impressive grip for a UHP tire. They come in 205/45/16 which is precisely the size I wanted, and the 340TW make them look like a pretty great option for a daily driver you'd take to the odd trackday or autocross.
http://www.tirerack.com/tires/tests/testDisplay.jsp?ttid=217
http://www.tirerack.com/tires/tests/testDisplay.jsp?ttid=217