Which big should Boston target in draft?

If Boston doesn't move up in the draft lottery, there's a good chance the Celtics will wind up with a pick somewhere in the 5-7 range, an area of the draft where big men like Julius Randle, Aaron Gordon and Noah Vonleh are projected to be picked.

Of the three, Randle is probably the one most likely to be off the board by the time the Celtics pick, if they do in fact end up drafting somewhere between 5-7. But with a number of young power forward types already on the Celtics' roster, from Kelly Olynyk to Jared Sullinger, would the other two -- Gordon or Vonleh -- make sense as potential draft targets? According to ESPN Insider Kevin Pelton, one does more than the other.