i would say the ultimate tyre choice would be the michelin pilot sports, as they offer the best grip possible and i know several other track dayers use them and rate them extremely highly.
the sessantas are about as close as you'll get while still paying only a bit more than the falken/toyo type price.
toyos and falkens are good but i think the other 2 options are better. toyos tyre compound isn't as good as it used to be and i find the side walls to soft, and falkens are very good but only to a point, and mittedly you'll only find that point if your pushing extremely hard, and i mean super hard. so for everyday fast road users the falkens are good. but if your a track whore then i wouldn't.
no point in turning this into a tyre review thread. as there are plenty of them already. but loads of info out there.
some like the stones in o50 form other like pirelli rosso's, so lots of choice but for me taking into price and performance the sessantas are the best option for those that are fast road users etc and do the odd track thing.