I agree with Aztar that we don't necessarily need him because our centers are solid. I do like Dedmon and prefer him to guys like Noel, however.
While our centers are "solid," Davis and Boogie torched them, showing we are weak against stronger centers. One wrong playoff matchup and we could be done. I'm intrigued by Dedmon as a long, defensively capable big getting 10 and 8 in 22 MPG, but definitely not overpaying for him. I'd consider a 2nd rounder.
That said, I don't think Dedmon would have been able to stop Davis, but he does give us a different look.