I hope the Suns aren't stupid enough to sign Derrick Williams. He's a tweener who has no place in the NBA. Giving him even $3M is too much, I'd rather one of rookies get his minutes.
Aldrich would be interesting for the right price.
I am thinking right price is out of realm this year. Go figure the one year the Suns can be players in free agency is the year everyone gets a huge bump in cap space.