For me when it comes to kickers I tend to play the guy who is playing the stronger D. My way of thinking, stronger D means less TD's, more FG's. Basically the stronger D will keep the teams out of the end zones forcing more FGs.
For that reason, I am saying Walsh.
As far as your D is concerned, I too would choose Seattle.
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