I like the parameters you've set, but I say dump Marion and find a place for Ben Wallace. Moving Sheed over to PF, he could be the back-up center, or remain in the 3rd PF slot.
I really like the defense at the 4 on the 00s, I don't see Malone and Barkley doing too much against them. I also think the 00s comes out ahead at the SF. As good a defender Pippen is, Dirk could still get his shot off, and Pierce would torch Mullin on the second unit. Other than that, the 90s are clearly superior at the other positions.
In a 7 games series, I like the 90s in 6.