Anyone who offers anything for two first rounders this year should be smiled at and replied to with "That's nice. How about one second rounder?" then walk away, no further correspondence entered into.
Seriously, this is the period where we set ourselves up to be the powerhouse playing squad of the competition for the next 10-12 years. Possibly beyond. build it with picks, don't squander it with trades for players at the 3/4 time mark of their careers.