All three of them are going to be great IMO. I give Hedman first prize, simply because he has the best set of skills and it probably won't matter which team he plays on.
I give Gogo the slight edge over Letang simply because he's been getting more ice time early this year, and because everyone else is so high on him. I haven't really watched the Pens play enough to comment intelligently on Letang's skill set vs. Goligoski's.
10 Team H2H Points-based Keeper League
G, A, PIM, SOG, +/-
W, SO, SV, GA
C: H. Sedin, Stamkos, Backstrom, Duchene, Granlund
LW: D. Sedin, Landeskog, B. Schenn, Tatar, Boedker
RW: P. Kane, Voracek, Hudler, Silfverberg, Toffoli
D: Ehrhoff, Edler, Franson, Del Zotto, Myers, R. Ellis, Hamonic
G: Quick, Bishop, Holtby, Peters, M. Jones
Farm: Terevainen, Nurse, Raanta
League Champion: 2009, 2011, 2013 and 2014
12 Team Roto Dynasty League Champion: 2011 and 2013