Odom was a much bigger matchup problem than Laker fans are letting on. At times, the Lakers rolled with Bynum, Gasol and Odom on the frontcourt. You're talking about 2 7 footers and another who's 6'10" with long arms. offensively and defensively that's tough.
Again, what people fail to mention about Artest is that he's not able to guard the quick PGs like Ariza could. That leaves either Kobe or Fisher to guard Parker. And if Gino is healthy, then I wouldn't want Artest trying to guard him either. Artest is a physical defender but Gino is too crafty and quick for Artest to body up. So the only legit option for that is Kobe. But wait, Kobe has to guard Parker.
So the Spurs actually have the advantage over the Lakers on the perimeter as they'd have two legit scoring threats that can create their own shot, initiate the offense, hit outside shots and get to the rim.
Artest and RJ are a wash (AS ARE DUNCAN AND GASOL). So that basically leaves Bynum vs McDyess. You know what you're getting with McDyess but Bynum is such a headcase that you don't know what kind of player he's going to be.