If you took Kobe Bryant off the Lakers, what would their W-L record for a whole season be?
If you took Pau Gasol off the Lakers, what would their W-L be?
The Lakers were playing at a 54-55 win pace with Bynum prior to acquiring Pau Gasol two years ago and were playing at a 53 win pace without Gasol this season. I think that's a fairly accurate indication of their talent level. I would consider them an outside contender (Atlanta) with that squad, but since the West is so weak at the top that means they'd still be right there.
Pau Gasol led Memphis to 45-50 wins for three straight years earlier in the decade. The next best players on those teams were (1) James Posey (2) Shane Battier (3) Mike Miller (4) Jason Williams and (5) Lorenzon Wright/Earl Watson. And on the final one of those teams it was an aging (1) Damon Stoudamire (2) Eddie Jones (3) Bobby Jackson and Batter/Miller.
I think the current Lakers team has a lot more help at the top end of their roster with Andrew Bynum, Lamar Odom and Ron Artest. By being able to keep their three man big man rotation and Artest, the Lakers should be able to remain an elite defensive team and an above average rebounding team. There are also a lot more touches to go around offensively (Kobe takes 22 shots versus 12/10 for Gasol/Bynum) so Bynum, Gasol and Odom will all be more engaged there. The Triangle offense does an excellent job of hiding flawed players like a Vujacic. With Gasol now the center of the offense, the ball movement continues to improve.
I think the Pau Gasol led team wins at least 55 games. When it comes to the postseason I think they'd be like the 1994 Bulls, a very good team but clearly not elite. Since, the rest of the West is the same, they'd be right in the mix but equal to most of the other semi-contenders (Dallas, Denver).
In the playoffs, I think the inside-outside threat of Kobe + Bynum is better than the inside-inside game of Gasol + Bynum. In the regular season, I think it's almost identical and possibly a marginal advantage for Gasol's team.
In the end, I'm not convinced there's a huge deal of separation between Kobe Bryant's and Pau Gasol's importance to the Lakers. They look to be pretty close in impact to me.