OK, what is a GREAT back then? I don't know what one is if he isn't.
Also, when people say a certain position shouldn't be drafted that high, a few positions behind you a team is luaghing at you. The best players should go where they are needed. If Benson is ranked #1 in this draft (on my board he is) and he's there at #2, you take him.
What positions go that high? Look at Aaron Rodgers and Alex Smith. Most boards do not have them top 4 (AR is usually 5th) but one of the them is going to be #1. Why? Because a QB is OK to take that high.
Draft the BPA, and Benson should be.