I think this year's going to be tough for you - you have a pretty imbalanced team - so with an eye on the future, I would redshirt one of the 3 guards, most likely the PG. He's got the highest upside of your guards, and the extra year will help make him a stud quicker. Plus, I don't like having 3 guards (or 3 big men for that matter) in the same graduating class, and RS'ing the PG would solve that problem. Because you''re switching to zone, your new C can probably help right away (great reb / SB).