Here's mine(this assumes Orapko is gone)...
Ayers(rising up the boards and after Orapko, probably the best available to play in a 4-3)
Brown(above average pass rushing skills).
Jackson(viewed as more of a 3-4 end and not as much of a pass rush threat).
Maybin(too small for my liking. He added 20 pounds, but how will that effect his speed).
I's be okay with Ayers, Brown or Jackson, but if all that is left is Maybin, I'd look at another position instead...Cushing?