I just went from a 15 to a 17 and the 17 feels noticeably different. The 17 has a much softer ride. Road input feels a little more vague on cornering yet the steering feels more precise on lower speed turns. I really thought there was nothing lacking on the 15 in terms of handling. On the 17 I am guessing a stiffer shock would help. I was also wondering if the skid pad number were the same. Seems like changing the front sway bar and torsion bar with softer springs and shocks would change the numbers a bit.