The Hawks aren't wanting to pay Horford this summer, so he should be decently easy to obtain. Other than being a bit older than we want, he's virtually a perfect fit at the five spot for us right now, and I don't think any better center will become available to us anytime soon. This leaves two questions:
1) Are you willing to pay him this summer?
and
2) How much will it cost to get him?
It actually just so happens that Amir is the same salary as Horford, and he'd be an ideal get for them due to his lower salary and the fact that it is non-guaranteed, in addition to being a good vet that will still help them.
So, if the asking price was Amir and the Dallas first this year, would you do it?