Way to much.
Anything less and the Bucks would just match. It has to be near the max, or the max. The Bucks may match it at the max too, but at least we put them right at or over the tax line with that.
Yes, it will be an overpay, but just like with Al Horford, it wouldn't matter because he'll be an excellent player for us, an excellent fit and a leader. The overpay will be justified because of all the good things he will bring, and man, on every facet of the game, he brings something good to it.