It also depends on your team building philosophy. Personally, I prefer establishing a solid rotating cast through good drafting and solid, mid-range free agent pickups with an occasional splurge here and there. I think having a team that doesn't fall off dramatically once you insert someone else is preferable and a little easier to do than finding superstars. Certainly, you hope some of your draftees and signings go off on a superstar level performance.
But I think that's what teams like the Seahawks and Giants teams of the past were able to do, at least with their pass rush. They just rotated in guys that could constantly produce pressure because they could stay fresh all game long.
And I mean, look at the Eagles. Hell, Milton Williams was a rotational player on that line.