I own Nabokov too, and I think I'd keep him for the time being. It doesn't look like Khudobin will get a lot of starts and I think you should be able to spot start Nabokov effectively enough to get better value.
I don't see Khudobin getting 20% of the starts (10) this year.
12 Team H2H Semi Keeper (1 of each position + 1 rookie)
Scoring - G, A, P, PPP, SHP, GWG, +/-, FW, SOG, BLK, PIM, HIT
Goalies - W, GAA, SV%, SV, SHO
C - Malkin*, Thornton, Dubinsky, Ott, Johansson
LW - Hall*, Saad*, B.Ryan, Vermette
RW - P.Kane*, Ryder, Oshie, Kassian
D - Doughty*, Green, J.Johnson, Seidenberg
G - Lundqvist*, Varlamov, Schneider