Eddie, without a doubt!
First, he was a great Celtic and was really loved by the fans. Second, he got traded, which means he didn't want to leave. Third, he just got traded so there will be that emotional factor.
Powe will probably get some recognition too but he did sign with the Cavs by his own choice (although Danny lowballed him), and the Cavs are more of a rival for us than the Knicks so... easy choice!
But it will be interesting to see how they are greeted, I'm definitely looking forward to the ovation Eddie will receive!