I think either way you're in good shape. If Gronk isn't there, WR-WR-RB is probably the way to go and something we've been preaching at the site as a good strategy. Lots of RB value a little later and we thinking grabbing WRs early works out the best. I'm usually a RB guy but through various mocks and leagues I've been trying WR early and RB a little later and I've been pretty happy with my teams.