I prefer full on slicks for playing at the track, myself. Change them in the pits and only put miles on them there. At over $200 each I'd rather drive on $100 a piece regular tires on the street than my track tires. You can get steel wheels made for your application in 15-16" size for under $100 each from Bassett or Aero and spec the backspacing on the wheels and get them powdercoated in whatever color you choose. Plus the steel wheel only weighs about 16 lbs each.