Need some more info on your league (al, nl, both?; how many teams etc), BUT
agree that you look pretty good, unless this is a very shallow league (10 team or less mixed league). In that case, you probably don't have as much power advantage as you think you do. Also, I don't know how much I would rely on Berkman for any SB help. After you analyze where you think you stand in the league, maybe you can offer someone that has speed (Crawford, Pierre et al?) one of your big bats for the speed and something else. For the moment, though, I would sit still until you get a solid grasp on the relative depth of your league and other owners strength/weakness. The season hasn't started yet - DO NOT PANIC!