I am assuming this is for the league in your sig. I am also assuming it isnt a salary cap type of league as you dont mention that.
Personally, if it was me I would be picking up Giordano in a hearbeat. I would easily drop Hamhuis for him and he would be one of your top 4 D instantly.
Your top 4 D at that point for me would be:
10 Team, Points Only, $$ League, Keep 20/25 at seasons end
25 Man Roster, top 20 monthly point getters count
Goalie points W=2pt L=-1pt SHO=2pt
Stamkos, Tavares, Hall, Couture, Hanzal, Wheeler, Stastny, Versteeg, Fisher, Hornqvist, Eriksson, Hodgson, Setoguchi, Turris, Steen, Letang, DRoy, Yakupov, Grabner, Byfuglien, Baertschi
G-Rask, Halak, Schneider