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?
Plus, Gortat has some potential for growth/improvement...Dalembert not so much.
Amir Johnson can give you 10/10 if you play him 36 minutes provided he doesn't foul out. I haven't seen enough of Gortat to comment on him from a defensive point of view, but I'm pretty sure Dalembert is more of an interior presence than him. Plus, wouldn't you like to see Leo squirm?