The Uproar and Fun 51 are both nice planes, but a bit too "twitchy" for a second plane.

Take a look at the Great Planes Rapture .40 as well as the Sig Four Star, Sig Mid Star, and Goldberg Tiger kits. All of these are excellent second planes and good first kit projects.

Edit: Oops, forgot to mention the Easy Sport .40 kit from Great Planes. That fits in with the above mentioned planes as well.