Taking a juco would help spread our guys out over different classes. In 2016, assuming no major injuries or attrition (NOT a safe assumption), our returning DTs would be:
1 senior: O'Brien
1 junior: Vickers
2 sophomores: Tuttle and McKenzie
1 RFr (I'm assuming): Picou
That's a group with outstanding potential, but it doesn't leave much wiggle room when the inevitable injuries/attrition do happen. I think it makes sense to take 2 HS DTs and one juco in this class.
Also, I really hope Picou gets cleared and does well.