"4-3 press quarters vs 4-2-5 press quarters"
I'm not too hung up on the nomenclature/numbering: 4-3 or 4-2-5. In this "4-2-5", with our personnel, you can bet it will be someone like BJ Foster or Overshown playing that 5th DB/nickelback position, and functioning sort-of like a Safety/LB hybrid. The right player in that position is fast enough to cover like a S and strong enough to tackle like an OLB. We have at least 2 of those guys I can think of (BJF and Overshown).
Make that 3: Owens, who might play it even better than BJF or Overshown by the time he's done on the 40. Owens may be too valuable at a "true" S position though.