People, people, people, as much as I love BBD he is not worth 4 million annually. Also, I doubt he will get that kind of amount on the open market anyhow seeing as there are much better players out there that will command more than he will.
I think we, as Celtics fans, fall in love with some of these players and then when it comes to re-sign them want Danny to do whatever it takes to get them back on the team no matter what the cost. Let's be real right now, there are about 8 or 9 other "bigs" out there that I prefer over Davis. Some of the top of my head include Sheed, McDyess, Charlie V, Hedo, David Lee, Millsap, Gortat, etc.
If what I have been reading has been correct (such as Charlie V possibly having to sign a deal for the MLE) then there is no way that BBD deserves anymore than 3 million annually.
Another concern with him is his weight. Sure, he seemed a little slimmer this season but what happens once he gets that big contract? I would hate for him to get paid like some players in the past and then just let the weight keep adding on.
Remember Isaac Austin? I would hate to see BBD wind up like him.
I say offer the kid a 2 year, 6 million dollar deal. It's low risk, high reward. If he continues to improve and lose weight, sign him to a more lucrative deal. But seeing as how the economy is and the other players out there that are better than him, I think 3 million annually is very fair.