I doubt the Cavs would trade Irving to their biggest Eastern rivals in the Celtics for the simple fact that they'll likely have to play them 8 or so times this year between regular season and playoffs. The Suns are a possibility, but they seem to want to keep their young core together and aren't willing to move their most highly touted prospects (Booker and Josh Jackson) for Irving. I think Miami could be a solid destination and don't count out Doc Rivers' Clippers to bring them back to relevance.