A good compramise is diablo`s for the road & a pair of just part worn race tyres for your track day, only cost you £10-15 to get your local friendly dealer to swop tyres for you. And before people start going on about not using part worn race tyres etc etc, it aint a problem, did a whole season on a F400 using ex Aprilla250 cup tyres, no problems, Cadwell before the chicane in 1min 42`s on a CBR400 with a stock engine
Chris