Yeah there aren't many 230 lb. beasts who run 4.3 with agility and can catch. Although I do recall Johnson abusing our ILB's last year. He doesn't run 4.3 but he can abuse LB's like that. Ultimately Monty can be a bit more physical than Johnson but he'll never be quite the home run hitter. Johnson reminds me of Marshall Faulk with their running and receiving skills. The list of guys who can do what Faulk could and Johnson can might end right there.
I'd be ecstatic with if Monty becomes a poor-man's Johnson - with a little more physicality.