They all do pretty much the same job, just how much do you want to spend. The Torsen cant be beat for the money. The Torsen is a torque sensing diff. It doesnt effect the driveability "that" much over stock. If you need one, i usually have them in stock. PM me if you have any other questions.
dang Mike, you just show up outta no where all the time...your like Batman....but w/ a bunch of car knowlage...I think Batman should have drove a FOFO...sorry back to the subject....I agree w/ Mike on this as well. It doesn't effect you DD that much, or if at all, but if you want one he would be the man to go to. They are quite pricy and unless your serious about it I wouldn't worry about it.