I'd rather have Noah over Bosh when all the mitigating factors are considered. I think Bosh has peaked statistically and shown no real desire to improve the weaker facets of his game. While I love that he added the 3 point weapon to his arsenal, I'd much rather see him show up to camp preaching defense and accountability.
Offensively Bosh is the perfect piece to add if your team struggles to score points, the raptors don't have that problem. Interior defense is problem 1 and 1a and Noah addresses that problem more than Bosh ever could.
I would much much much rather go into next season with a front court of Bargs and Noah than Bosh and Bargs. Only way it happens is if Bron/Wade force Chicago's hand by saying they won't come without Bosh. I don't really see that happening, but its not that implausible. As perfect a fit as Noah is for Chicago he isn't so integral that he should prevent Rose, Bron and Bosh teaming up.