I'd like to think that the OKC guards will apply the same relentless pressure to the Spurs that my opposing GM has applied to me in this thread.
I still think that Rose and Howard will consistently bring more to this series than Love, Iggy, and Thad Young will bring.
If Love is indeed going to move to C in a smallball lineup, he's going to expend a lot of energy on defense trying to deal with Howard.
Likewise, the Spurs are going to have to come up with some kind of strategy to defend Rose, who elevates his game to another level in the playoffs. If it's some platoon committee of Kemba/Ridnour/Douglas, I think that's going to go well for the Thunder. Iguodala? I can bring in a secondary guard like Maynor, Gordon, or Belinelli--all of whom are capable ball handlers--to help run the offense if needed. And once Iguodala needs rest or runs into foul trouble, we're back to a mismatch for Rose.
Taj and Haslem aren't going to hit double figure scoring very often in this series, but that's not what they're out there for. Rebounding, physical play, and tough defense on the Spurs bigs is what those two will bring.
I can see the Spurs shooting their way to a couple wins in this series, but I don't think they can consistently shoot well enough to win four games.