Haqndling Upgrade

I have become accustomed to my vehicles being able to negotiate a turn without alot of tire squeal and think a swaybar on the rear of my Sierra will do the trick. I see that Hellwig and Hotchkis both make swaybar for our trucks. I may just be inclined to add a rear bar and the Hellwig is the most reasonably priced. Anybody got any experience with either of these? If I buy the rear bar, will I need an upgraded front bar for balance?