I don't know about the 3-4 defense, it's fine if we would finally get some players who can play this scheme. No, I do not mean has been and backups like Bowens, Wadesworth and others we tried this summer. Time to open the checkbook and aquire some real players. I don't care how much a Terrell Suggs will cost in the summer, do everything to get him. We need impact players and guys who can play our D.
On offense it's the same problem - guys like Clarke or Clement shouldn't be starting in the NFL and definitely not for a playoff team (well, guess what, we are far from being one). Mangold and D'Brick will come around, both are good young players who already show a lot. But again, other teams are spending big time on true maulers yet we still sit their hoping that our 6th round pick develops in the starter. Maybe Bender will do well but hell, this can't be our plan for success. Chad Pennington, as much as I respect and like him, the season is over so give Clemens the chance. Move on...
Now let's take a look at some players who could really help us from next year's Draft. No skill positions, no secondary players - we need A LOT of help in the trenches. We have to draft players for our Oline and even more important for our front 7:
Quentin Groves, DE/OLB, Auburn, 6-3, 255 lbs

Groves is a tremendous pass rusher off the edge and he lives in the backfield. Incredibly quick, he has been the biggest impact player on the Tigers defense. Perfect fit for the outside linebacker position.
Jasper Brinkley, MLB, South Carolina, 6-2, 262 lbs

A tremendous and disrupting force at the linebacker position. He will miss the remainder of the season with a knee injury, either he will be a steal later in the draft or he might get a redshirt (not too familiar with his situation here).
Tyson Jackson, DE, LSU, 6-5, 295 lbs

A gigantic presence on the defensive line. Has the size and strength to be a good 3-4 defensive end. He comes from a very pro oriented program and is part of one of the best defenses in the country.
Red Bryant, DT, Texas A&M, 6-4, 322 lbs

I don't know but I'm sick of seeing DRob getting mauled of the line of scrimmage. Bryant is a huge kid and could be groomed into the role of the NT even though it's risky to fill that position with a higher pick.
Derrick Harvey, DE/OLB, Florida, 6-4, 266 lbs

Had a tremendous showing in last year's championship game. He can get after the quaterback with the best of them and is athletic enough to help against the run.
I would also mention Glenn Dorsey but I'm not sure if he can put on as much weight as he would need to do for the 3-4... otherwise of course he's a beast.