You draft the best available player. You can never have too many good defensive ends. We've seen what happens when our depth gets depleted - both at WR and the O-Line last year and the dismemberment of the Dream Line (Wads-Swann-Smitty-Rice- a few years back.
If we were to acquire Colvin and/or Holliday and Okeafor - and Suggs fell to us, I'd draft him anyway. And I'd keep VDB too.
Wakefield might have to gain weight and move inside or be the odd man out, but hell! Let these guys all duke it out with the objective of the survivors forming a really talented and deep D-line.