Grip size is totally subjective to the player. I feel like I get more control with a larger grip, especially with a 2hbh. A lot of players prefer smaller grips for more maneuverability and topspin, but some hardly notice a difference in playability. The biggest question is how you want it to FEEL.
Fischer Pro #1's, Tour Bite 16/Gosen OG 16 @ 55/56.