Although it is three months away, I am enrolled for a May 4 drivers school/track day at Brainerd International Raceway. I will have Kumho XS on the car. My question is that for the first time on a track, how important do you guys think having DOT track tires or full blown competetion tires are?? Will I enjoy it on street tires or wish I had track tires? I have an extra set of wheels but only 8" front and 9" rear. If you feel track tires make a huge difference do you think I can get away with the biggest I can fit on these wheels?