The best way for the Celtics to obtain a quality Center is via trade, IMO. When your best possible free agent target is Kwame Brown, you need to look at different ways of getting someone who can produce. It's something i think Danny is looking in to and i wouldn't be surprised to see pieces like Avery Bradley, Jeff Green, draft picks and trade exceptions traded away for a center.
Possible targets: Zaza Pachulia, Spencer Hawes, Anderson Varejao, Ryan Hollins, Ben Wallace, Hasheem Thabeet, Chris Andersen, Darko Millicic, Marcin Gortat. All viable options.
Varejao is the guy that intrigues me. Is exactly what the Celtics need. The question is would Cleveland trade him? Most likely no but they'd have to at least listening if we were offering up a guy like Jeff Green.
I think the Celtics have more options than people think.