5 years, 34 million. I think if you plug him in right now as starting center for the raptors, he will give you 10/10, good man-to-man and help defense in 36 minutes of play.
I don't think it is fair at all to compare him anyone in the d-league. Just because he can't get minutes behind Dwight doesn't mean he sucks. Don't you remember his good play in the playoffs, or last season?
Finally, look at the numbers:
http://www.82games.com/0809/08PHI13.HTM
http://www.82games.com/0910/09ORL11.HTM
Similar production, but Gortat is half the price.
Plus, Gortat has some potential for growth/improvement...Dalembert not so much.