Forgot to add a couple things here..
Are you running staggered tires/wheels in front/back?
How much body roll do you have?
As you probably already know, heavier springs are really the way to address body roll and sway bars are really just a fine tuning device. On my own car, I run very light springs, but a pretty heavy rear bar, as mentioned above, to maintain a better ride, but flatten her out a bit on the streets. This is great for the DD side, but not great fix for my AX events.
What are the ULTIMATE goals for your ride?