Where oh where will Prince make his new castle?

Washington seems to be new front-runner for Fielder's services, but I don't know how signing him to a long-term contract is what's best for the Nats. They already have a decent first baseman in Adam LaRoche, plus breakout player Mike Morse played 85 games at the position in 2011. The Nationals current depth chart has just Morse, Roger Bernandina, and Jayson Werth in the outfield. Why would adding another 1st baseman to the roster help that? The Nationals do have a great unknown advantage in signing Fielder. Washington D.C. is the #1 vegetarian city in America and Fielder is MLB's best-known veggie lover.