Unfortunately no one knows the mindset of Beane and McD and what they wish to accomplish at this point. Heck, they might not even know yet. They have proven themselves, especially McD in pin pointing scheme specific talent in the later rounds such as Dawkins and Milano. Do they trade up for their guy or sign a FA vet? Do they stay put and draft 2 blue chip players like a stud LB, DT or WR? Trade down as you suggest and stock pile players and hope you get quality starters?
IMO, I see a FA/Trade (3rd Rounder) vet like Smith or Bradford and draft someone to compete with Peterman.
Draft a stud DT/LB with our 1st and trade down with our 2nd first rd pick.