Move Horford to PF, sign a free agent center like Mason Plumlee, he's young and a rough tough kid, he scores a little, rebounds well. He has up-side remaining. Sign him to start and play 20-22 minutes a game. When you want to go small sit him down, and move Horford back to Center. This way we have a true big available to deal with the full size centers.
I'd like to have Noel, but he may get big dollars and stay in Dallas.