Nash, Gortat and Warrick for Rondo and O'Neal
Reasons for Phoenix
The Sun's get a young PG who is under contract to build around, instead of losing Nash for nothing this summer. Also they get rid of Warrick's contract which although it is not that bad ties up cap space. Obviously losing Gortat hurts, but getting Rondo is more important.
Phoenix Lineup 2011
Rondo/
Carter (Will be waived)
Dudley/
Frye/M. Morris
Lopez/O'neal
2012 they have lots of Cap space a great PG to play with and solid hard working role players in Dudley and Frye. Plus maybe the Clippers pick from the Celtics.
Reasons for Celtics
You have a pass first PG who can shoot and really spaces the floor. Gortat is a tough, rebounding Center that would be great next to KG. Warrick is nice back up with athleticism and you can trade BBD for backup SG/SF.
Conclusion
The Celtics get one shot at the title and then everyone either moves on or signs at a discount to stay in Boston.
I see Ray Allen staying in Boston for a low price, as his family lives in CT and he can distance his 3pt record.
Pierce is under contract and you have Gortat in the middle. You will have Jajuan Johnson in the post next to him as a KG-lite type player.
The Celtics would have plenty of cap space still and could chase, Paul, Williams or another star player. I would suggest signing OJ Mayo to start at the SG and then trying to sign a star.
Lineup 2011 Celtics
Nash/Bradley/Moore
Ray/Delonte/Moore
Pierce/Green/
KG/Johnson/Warrick/Green
Gortat/Johnson/Diop
Lineup 2012
Bradley/Moore
Mayo/Ray
Pierce/Green
Johnson/KG"maybe"
Gortat/Diop
The lineup in 2012 is not great but you have to rebuild and get lucky sometime.