I know I was supposed to stay out of it, but........
The standard grip on the Falcon (and most of the others) runs big. It's no problem to have that modified if you want. Marc prefers a large grip (helps you avoid torquing), and unless otherwise specified that is what he will do. Speed between the two is very close (as long as you get a bow that is matched to your draw). The biggest thing to consider is do you prefer a take-down or a one-piece.
Chad