Is it worth upgrading the stock REAR anti sway bar?

I use them in my DD and sell a tone of them. I dont even notice a difference really. Neither do my customers for that matter.

On a side note, the pan hard bar or watts link doesn't really help with body roll. It is more for keeping the rear end located under the car where you want it. You will still need a sway bar, In that case, still, a factory solid one will do the trick 90+ % of the time.