It depends on the type of league you are in and how many goalies you start... I'm assuming you're starting at least 2 goalies. I'd be looking to grab your first goalie in the first two rounds. However always draft best player available, as you can easily trade a marquee name for a better goaltender than you could have had with that pick originally
I understand what you're getting at in terms of picking up a surprise for this season, however in a 10 team league that shouldn't be your first option. You need a solid option and than can take more of a gamble later on in the draft.
[color=#008000]24 Team / 3 Tier Roto League
G|A|+/-|PIM|PPP|SOG|Hits|BS
W|GAA|SV
Tier 1
C: Tavares, Duchene, JStaal, Marner, Grigorenko, Dubois, Barzal
LW: Landeskog, Teravainen, Pearson, Wilson, Pulkkinen, Bittner
RW: PKane, Gaborik, Virtanen, Rantanen, Stewart, Sprong, Chiasson, Vey
D: OEL, Barrie, Bogosian, Larsson, McNabb, Oduya, Bigras
G: Bobrovsky, Korpisalo, Hutton, Hellberg