We would let Nurk walk or get very little for him in a sign and trade but I get what you're saying.  If you think that Chet is the bigger difference maker out of him and Nurk, you're totally right that you take Chet and get whoever makes sense with him instead of sticking with Nurk who you view as less of a positive impact.  Personally, especially with Chauncey as the head coach I would like everyone on the team to be extremely mobile but you can't always get what you want.  Unless of course someone values Chet much higher than we do and then we cash him in for pieces that fit with what we have and keep Nurk's value.
Anyway I cut it, I would take Jabari ahead of either Chet or Paolo... both Chet and Paolo are better at putting the ball on the floor and facilitating offense and Chet is obviously the better rim protector but Jabari is the best athlete of the three, the best overall defender of the three, the best shooter of the three and I think him and Chet are about even at finishing at the rim... oh and he seems to have the best timing as a rebounder out of the three.  If we end up in the top 4 I think it would be worth guaranteeing Chicago the pick so we could trade a future lottery protected first to get to Jabari if someone else is looking to get him before us.  I especially think Jabari fits the best in our system with Dame, Ant, Grant (assuming we trade the Pels pick for him) and Nurk with two of the best bench players we've had in a long time in Hart and Nas plus whatever else we can get in free agency and trades.  But unfortunately Jabari isn't part of this thread.