I would think you would get better performance with the Lock-rite, myself. I have seen both in action, and am not very impressed with the limited slip. The locker is cheaper, and is not noticeable on the rear at all. It will unload the pressure built up, so is not the same as a spool, or welding the spider gears together. The lincoln(welded) locker is not recommended, but some guys do it. A pretty cheap fix that will sooner or later tear up something. OOpps.....you were wanting it on the front. You will feel mechanical lockers in your steering, but still work better than LS.
One more suggestion, and then I will quit. Have you tried to find one on E-bay, sometimes you can get really great deals on there.