Why for Raps: Get Harden for a relatively fair price, see what he can do and if he doesn't work it didn't cost too much.
Why for Bulls: I like Gary Trent JR, I think he's a good player and the two first round picks could be solid. Bulls management might argue for more, but I'd argue Lavine's max extension dampens his value just a bit.
Why for 76ers: Lavine/Porter JR add much needed athleticism and size to the team at the perimeter.