Brick, for someone like you who preaches defense a lot, you sure have fondness for offensive bigs who don't play a lick of defense.
Bigs who win championships are good to great defenders: your Shaq, Ben Wallace, David Robinson, Duncan, Rasheed Wallace, Gasol, Rodman, Laimbeer, Hakeem.
Al Jefferson is just a guy who scores a lot of points, grab a lot of rebounds and don't win you a lot of games. We've seen his type of bigs before (Zach Randolph, SAR, etc). This type of bigs will make your team entertaining but they never take you to the promise land, not even when they're paired with supposedly star players.
There is a myth surrounding Al Jefferson. The myth is that he can be an average if not good defender if he is just put back at his rightful place at PF. As if coaches have never thought of it before. Fact is, Jefferson is even worse at guarding PFs than Cs. Jason Thompson, for all his flaws, at least tried to guard his man. Jefferson, for all intent and purpose, plays as if there's a clause in his contract that reduces his salary if he even attempt to put his hands up.
That's not to say I'm completely opposed to Big Al. If the Kings are going to abandon this defense thing and just go all out Phoenix stylethen I say get Jefferson and let's have some 150-145 games. But if there is a believe that defense needs to be stressed then JT is the better way to go. This has been said many times before but offense is not our problem. We desparately need a good defensive big and Al Jefferson is not that.