I'm a Pirelli fan. Used to use the Diablo Corsa IIIs, which have been replaced by the Diablo Rosso Corsas. Great track/street tire!
In the last year or so, I started running warmers and DOT race tires. First it was the Dragons, Pirelli's older spec race tire. Great price point. Then last year I tried their current race DOT.. the Diablo Supercorsa. OMG I love these tires.
Pirelli also makes a trackday slick that doesn't require warmers and wears like iron. Haven't given those a try yet.
Not sure when my next dates are...probably NJMP and BeaveRun in July.