You're Masai Ujiri. Your team is defending champs, but you just lost the best wing in the league and you're a little wing-light, yet you still have a very talented roster featuring Lowry, FVV, Siakam, Ibaka, Gasol, etc. But you really need another great wing on the roster if you're going to contend again. Through some sort of dystopian nightmare, you get a chance to steal any one player you want from the Celtics to put on your roster. You can get Jaylen Brown (at $6.5 this year, 4/$115 to follow), or Jayson Tatum - whom, let's assume for sake of argument, would be willing to sign a market-rate 3-year extension to his present deal (so both have 5 years of control remaining for roughly the same total dollars).
Who do you pick?
Who do you pick?