Ok, I just learned that the 1 inch PP lowering springs wont do any lowering on 4x2 (3rd gen) 4runner. With that said, are they still worth getting?

I'm sort of debating between PP springs or addco sway bars. I'm so torn on the two and my budget will only allow for one.

What i'm going for is high speed stability on the highway!
(of course a tad better on road handling).

Which would be the better improvement for highway driving? Are they a dramatic improvement? or just a little?

Or should i forget about both of these and get some AIR TOOLS?

I already have polyurethane bushings for my front sway bar/endlinks, and rear endlinks.