I would put around 400 aside for track tires. A good set of slicks to put on and make a ton of laps on is the Pirelli Superbike PRO tires. $360 a set and they will last a long time. This will save you more cash in the long run to spend on other stuff. Racers have won races on these tires so they are capable. However, there are faster Pirellis out there to go to, when you feel comfortable.