Best LSDs are the plate types, the likes of Cusco and Kaaz, but these ten to be noisy at low speeds. If you can't deal with the noise, then Quaife ATB is indeed your best bet. Caveat emptor: Quaife ATBs work well as long as the low torque wheel still has some grip and some available torque, but if you lift a wheel in a fast turn it will immediately revert to zero torque all around like an open diff..... Hope this helps Cheers