Pathy vs. TB:
I have owned American/GM products and will do so never again. Build quality, fit and finish, and long term problems are indelibly etched into my psyche. The Pathy will turn 36k today and there has only been one minor thing to complain about, the external temp gauge reads 5-10 degrees high in the summer. Oooohhhhh big problems!!!
Our SE has the LSD and I love it! It has performed great during 4x4 trips to Utah.
One note is that it took a bit of getting used to during the winter/snow season. It grips great, but since both rear tires tend to slip together rather than just one, if you goose it, both tires will break traction and the back-end will want to wander to the side. My old Cherokee would just slip one tire. Since only one tire was spinning, the other rear would help keep the back-end straight because it was just rolling along.
Another note is that LSD is not a locker! For the LSD to work best, both tires should have close to some amount of resistance. If one tire is on a solid surface, and the other on ice, or in the air, the one in the air, or on the ice will spin-silimar to and open diff. You can negate this a bit by using the handbrake to provide some braking to the spinning tire, but it is not a super effective method.