If the Jazz can't grab Irving, Williams or Barnes (if he declares), Biyombo seems to be as good a pick as any. If Biyombo, Valanciunas and Brandon Knight are on the board when the Jazz pick (with Irving Barnes, Williams already selected), the decision might come down to who's easier to move (Big Al/Millsap or Harris). A frontline of Favors and Biyombo looks pretty damn sexy though.
The potential is amazing to think about. Both play great defense, both rebound, both are long, and both are athletic finishers. It will be interesting to see if Biyombo climbs/falls on the draft board after teams get a better look at him.