I've been playing Pro-Marks for almost a decade now. While I'm considering moving down a weight, I've been using 5Bs, usually the Shirakashi Japanese Oak ones (the one with the Sumo wrestler's figure on it) for close to 6 years now, with the Millennium II finish. It's the PW5BW. The hickory counterpart is TX5BW, with a 16" length.
Since I sweat a lot, it's important that the stick doesn't slip away. The Millennium finish makes it work for me.
I play wood tips only. These are long, beefy sticks which are great for both practice pad playing as well as laying it down; the reason why I wanna change to a lighter stick is dynamics, I feel a lighter stick will help me achieve goals on a dynamic level that the 5Bs aren't probably allowing me to express.
As for signature models, I am not a huge fan of those: to each his own, right? I have played the Simon Philips model (though I'm not a great fan of round tips) and the Carter Beauford ones, both are excellent, Simon's model being longer. The most satisfactory experience, however, came from playing Benny Greb's sig model, which is 5BG (a nice personal touch, that!).
Now I have a question: anyone tried out the Vic Firth 55As? Any feedback?