I'm not too excited about Noah yet. If we can be in the top half of the league at both big spots, we should be able to make the playoffs, if our bigs disappoint (like they usually do), we won't make the playoffs.
Don't get me wrong, I like Noah. But I don't think he is the right guy to have in there at center. He's a power forward. He only has an 8'11.5" standing reach.
Here's a list of players with a bigger standing reach that are relevant big men in the NBA right now:
Udonis Haslem, Jason Maxiell, Darrell Arthur, Michael Beasley, Al Horford, Rudy ***, Chris Wilcox, Reggie Evans, James Jones, Trevor Ariza, Jordan Hill, Kwame Brown, Nick Collison, Marvin Williams, Hakim Warrick, Tyrus Thomas, Julian Wright, Amare Stoudemire, Carlos Boozer, David West, Luol Deng, Aaron Gray, Brandan Wright, Taj Gibson, Malik Allen, Jared Jefferies, Nene Hilario, Chris Bosh, Charlie Villanueva, Anthony Randolph, Earl Clark, Ersan Ilyasova, DeVon Hardin, Austin Daye, Jason Collins, Tyson Chandler, Al Jefferson, Marcin Gortat, Elton Brand, Andrea Bargnani, Lamarcus Aldridge, Kevin Durant, Spencer Hawes, Chris Kamen, Emeka Okafor, Channing Frye, Andrew Bogut, BJ Mullens, Eddy Curry, Darko Milicic, Dwight Howard, Vladimir Golubovic, Hasheem Thabeet, Desagna Diop, Brook Lopez, Shaquille O'neal, Brendan Haywood, Deandre Jordan, JaVale McGee.
(Note this list is missing guys like Big Z, Gasol, Bynum, etc. who don't have measurements recorded).
What's this mean? There is almost never a moment that Noah is on the court at center, that the Bulls aren't at a size disadvantage. You don't want a small front court, and that's what you get with Noah starting at center.