Sptsjunkie
Starter
Gasol is no longer just an average defender. He used to be but he improved his defense last season and the Lakers won it all. So Gasol is another example that makes my point. You need defense back there. And there is no comparison between Gasol and Al defensively. Even on Gasol's worst day he's still a much better defender than Big Al will ever hope to be.
So then your premise is that players can improve defensively. Gasol is a better team defender, but if you were looking to trade for a defensive big you would not trade for Gasol.
Frankly I agree with Bajaden, get Jefferson and then pair him with a big who plays D.
Or just get the team as a whole playing good team defence. As I've said before, neither Webber or Vlade were great defenders, yet our 2002 team in particular was one of the top 2-4 defensive teams in the league.