If we do sign Ray, I think we are set at gaurd (Rondo, Ray, Bradley, Moore and then why not Dooling and Pietrus).
If we sign Green we are set at SF (Pierce, Green, Kris Joseph)
If we pass on Bass, we have quantity if not quality at PF (Garnett, Sullinger, Johnson, Williams) although with Green he can add some quality to the depth at PF.
So that leaves us at Center. It seems to me that if we get Green, then we try and S&T Bass for someone better or more ready than Steisma/Mello/Hollins and keep the MLE for a rainy day or just use the MLE for a C.
If we sign Bass, that probably moves KG to C which may be OK but probably not better than if we get even a reasonably good Center.
I don't mind Bass at say $5m or $6M but the problem is that he is probably going to get 4 years. I don't think we want Bass for 4 years.