It's a shame THQ didn't allow AKI to develop there games for the PS2 as well; the ridiculous system Yukes developed for "Smackdown!" makes me feel like I'm playing Mortal Kombat instead of wrestling.  The AKI system provides the best wrestling simulation of all games.  The movement is accurate and believable, and the reaction the characters have after hurting a particular body part makes for a good wrestling experience.  I also particularly like the fact that there is no "health bar" on the AKI games.  This gives the game more of a "give and take" feel.