For me its a toss up between Undun and Life Is Good. I could see Grammy voters having the most familiarity with the Roots as a result of their gig with Jimmy Fallon, vaguely recalling that Undun was a concept record and as a result, voting for Undun. Could also be a way of awarding the Roots for their storied career (although Nas deserves the Grammy for this reason just as much if not more). At the end of the day, as long as 2 Chainz doesn't win...I'm good.