This is not a trade suggestion.
What I'm asking is if you are building a team from scratch, and have a choice to build around Rajon Rondo or Joakim Noah, who do you pick?
Each has been called an ultra role player: a guy who can't be the go-to scorer, but is elite in every other aspect of the game. Both are among the best passers, rebounders, and defenders at their respective positions. Both are leaders and step up their game in crunch time.
The easy answer here might be "there are more good PGs than Cs in the NBA." But I am hoping for a more in-depth conversation than that 
When Durant and Horford (and Oden who actually was my 3rd choice) were clearly going to be unavailable with our pick in 2007, Rondo and Noah were my top two choices to draft (Jeff Green was actually 3rd), so I feel compelled to weigh in on this 7 years later.
Someone said they'd rather have Rondo in the playoffs, and so would I, but building a team defense, structure and even offensive ball movement system with Noah in the high post as a key initiator - that might be a better recipe for getting to the playoffs if both players command a max deal and both teams have an equal shot at filling out the roster. The fact that there may be more elite point guards in their primes than SGs, PFs and Cs combined, that counts for sure.
The thing is, I don't really believe we can say Noah is the right answer over Rondo. But I also don't think you can obviously say Rondo over Noah. I think we're going to learn a lot in the next 2-3 years if we keep Rondo. He'll be thrust into a role more like early Noah, an alpha dog on a young upstart, with Noah on a top 2 team in the East taking on a Rondo type of role- a top 2-3 guy on a true title contender.
We'll see what each guy can do in situations that aren't the same as the others' but have some similarities, how Rondo leads these pups, if Noah can make let alone win the finals as a top 2 guy on that team. I love to speculate, but this one is tough.