The rumor that's been floating around the past two weeks is #3 + Amir Johnson + Marcus Smart for Butler. By landing Butler, Smart becomes expendable and they now have Bradley, Butler and Jae Crowder, three of the best perimeter defenders in the league. If I'm CHI, I hold out for more, but if Ainge pulls this off and lands one of Durant or Horford, BOS will be pretty fucking good, If he can somehow land all three of Durant, Butler and Horford, they are legitimate title contenders that match up very well against GSW.
Remember, BOS handed GSW their first home loss of the season and took them to overtime in BOS earlier in the year. They played GSW well with their current roster due to their tough perimeter defense. They add the 6'7" Butler (3 time 2nd team all defense) and Horford (great pick and roll defender and solid post defender) to the mix, plus a go to scorer in Durant. It gives BOS the versatility to go either big, or small. Their big lineup of Bradley, Butler, Crowder, Durant and Horford would be insane defensively and not lack for scoring, either.
Assuming, we're not in the running for Durant, I'd love to see him go east. WAS would be my first choice but I'd be fine with him going to BOS, but I'm still holding out hope Olshey can convince Horford we're the best fit for him.
BNM