It all depends on how you plan to use your car. For a nice street set-up the Hotchkis package will work very well. A Torsen posi. or one of the geared units will allow you to put power down to both rear wheels and will reduce under steer without the need for huge sway bars.
The Herb Adams bars were designed for a stock suspension and drive train. IMHO they are too stiff for a car with other suspension mods. My car is neutral to over steer on the track. Not a problem if you do not Lift in a corner, but I am thinking of putting my stock rear bar back on to make the car a little more forgiving.
96BBB,ERE-383 #7 AI Heads & Cam,TKO-600, C-6 Brakes-Tuned by TAD
96 Caprice B4U Mostly stock
01 Corvette Z06 work in progress
14 Caddy XTS V Sport daily driver