I came away impressed with Butler. He's playing on a team whose only other option is the rapidly declining DWade. He plays hard, defends, rebounds and takes on the scoring load. He's not a top 5 player, but is on the cusp of top 10.
The trade proposals thrown around in this thread were mostly from rumours about what the Bulls wanted, not what people here wanted to give up.
I still think he's worth a Nets pick, Crowder or Bradley, and someone like Rozier. He'd be a great fit on the Celtics