Where are you upgrading? Which players are you removing from the team in order to upgrade? I'm not asking who you add, that's a silly exercise and we don't really have the info needed to do that, I'm asking who you subtract.
My position is that our infield is set other than 1B, and our outfield is solid/strong with upside across the board. If a superstar falls into our laps, absolutely make an upgrade in the OF, but Vladdy/Bo/Biggio/Jansen is set and good for the foreseeable future.