I currently have the 907 D2 driver with a UST Proforce V2 shaft (76g, 2.2 Torque, Stiff Flex). I will be getting the 910 D2 when it comes out but getting the right shaft is important to me. I like the Proforce shaft because of the low torque and the solid feel that the shaft stays with me on the downswing and does not lag behind me. I know that shaft has been out for a while and I was looking at getting something newer. What are comparable shafts to the Proforce V2 that Titleist will offer in their 910 D2 driver (stock or custom shafts)?