Classic, all the way. I have VERY LARGE hands (a Glock 21 fits my hands real well) and, so far, none of the stocks that I have tried that have finger grooves fit me at all. The finger grooves are in exactly the wrong places for me. In fact, nothing that I have tried that has finger grooves (including 3rd and 4th Gen Glocks; as much as I LOVE Glocks, I won't buy any of them made with finger grooves because they don't fit right) fits me right, including Hogue stocks.
Bub