Just to dream a bit, what would our line look like with Jonathon Cooper and Khaled Holmes? Half a year from the draft, that looks completely reasonable for a team picking 25th-ish.
That'd be something serious to build on. Between the tackles, at least, that'd be deadly once the rookies got up to speed. Add a Manase Foketi (kid who wanted out of Kansas St. last year) in the late rounds as a RT prospect, and it'd really be something.
Drop Urlacher to add a Long or Clady, and our line's improved...but maybe just on paper, and definitely at the cost of our soul. We'd still have to shore up the interior through the draft, and we'd be left with a big Urlacher-sized hole on D and in the locker room.
Most of our current linemen aren't starter-quality, and half of them don't belong in the league. That's just what it is. Building a top-notch line won't be easy, but if we're serious about it, there's no reason to think that we can't assemble the pieces in 2-3 years.