Don't dismiss Buells in the handling department. I've tracked my Ulysses and passed many a hard core, full bore, race replica sportbike.
Now, when the track goes straight, you need to get the hell out of the way because that pissed off guy on the Gixxer you just passed is going to show you what a "real" bike is like. LOL!
My track bike is a Gixxer 600, and I got abused by a couple of Buells my last track day. I swear, those bikes handle like they are stuck to the track.
As for the brakes.....you guys slow down???? Why?