Nope, great deal for you.
Vick is an upgrade, there is always an injury risk with him because of his play style but even if he goes down you have a solid roster that should still keep you competitive. Now if Vick stays healthy I don't see how anyone can beat your team. Lets face it, you would have AP, Vick, Hillis, Calvin and some solid surrounding players.
Benson is extremely undervalued, he quietly put up 1100 yards and 7 TDs last year, and if he doesn't perform you have Hightower, LT and Thomas on your bench. I might even try to upgrade at tight end with all those weapons because Lewis value I feel just took a hit with Garrard being cut