Before we have a real clear idea of who we should draft we have to know the following
1. are the Bills going 3-4 or 4-3
if your going 4-3 Bowers as a DE with Troup and Williams as DTs seems to make the most sense, or you could go Fairley as a DT and move Merriman to DE
IF you make the decision to go 3-4 then Dareus or Fairley both make sense but you have to find a real NT and make a decision on Williams as a 3-4 DE
the problem is whichever way you go you're going to have 2-4 players who are less than perfect fits
Overall I like the Carrington, Williams, Fairley, Merriman DL but here are some others
Carrington, Williams, Troup, Bowers
Williams, Big NT like the guy from Miami, Fairley or Dareus
Williams traded Carrington, Big NT, Fairley or Dareus
Carrington, Williams, Fairley or Dareus