Spurs- Sign Parker. He'd be a great addition to their "Big 4", or sign a good back up center.
Magic- They should be fine with VC, Nelson, and D12.
Nuggets- My Darkhorse sleeper pick to win it all. I have a gut feeling Melo will just EXPLODE this upcoming season. I don't know if they have a MLE, but if they do, they should sign Marquis Daniels to get another good defender.
Blazers- As much as I hate the Blazers, they do have a title contendeing team if they sign HEDO. If they don't sign Hedo and opt for Ariza, IMO, they have a lesser chance of winning it all rather than signing Hedo.