You're point about using a rear LSD to make a higher bias center even more effective is right on. Especially because you get on the throttle just after the steady state cornering situation, but well before the full throttle corner exit situation. At that point, not that much weight has transfered to the rear, thus the inside rear wheel could have the least traction for an instant. If you have an LSD in the rear, it forces the Torsen to see more torque resistance in the rear than there really is at the ground. This will assist in getting weight transfered to the rear quicker, and to a larger extent, thus being able to take more advantage of the high bias center.

You're also right that there is more to the equation than just wheel weights, but it's not a bad simplification, just to get the point across.

Like I mentioned, however, each person's requirements depends on how the car is being used, and how the rest of the chassis is tuned. In your case, being another autox junkie, you would definitely benefit from having both a high bias center and a rear LSD. I'd have to know more about how your car performs now to be able to decide which should come first, however. In our case, the LSD came first cause that's what we could get first. And in hind sight, I think that was probably the better way to go for our situation.

Corey S