I've said before for Lebron it should either be Chicago or whatever team can create a cocktail and match him up with another potential superstar (Let's be honest here. Wade)
Chicago really makes the most sense for him as a team. Sure, there would be some issues with him and Rose needing the ball. But the biggest problem LeBron has is that he has HAD to be the ball-handler all this time, so it's too easy for defenses to collapse on him. He can learn to work with Rose.
And the other pieces fit very nicely around him. Deng is a bit overpaid and they might want to move him if they can, but if he stays, he's still a great 3rd option. He has no inside game but wouldn't need one.
Tom Thibodeau (the Celtics defensive guru) just signed as coach, which is also perfect. Rose could be a Gary Payton level defensive player under the aegis of someone like Thibodeau, especially if the pressure to score was taken away. Just look at how Rondo developed. That team could challenge right away, I think, whether or not they get Bosh, Amar'e or whoever. In a couple of years, they would likely be the favorites.