what about sway/strut bars on the front/back. i would imagine that stiffening the back all you can would be advantageous, and that perhaps a strut bar on the front would help keep both wheels equally plantedbut no one's really mentioned this, i guess they don't help that much.

a more expensive alternative to avenger springs might be getting a set of eibach sportlines and eibach prokits and using the prokits on the back and the sportlines on the front and selling the other pairs of springs you have, but sportlines are pretty low.

another thing is dropping the air pressure on your front tires some (but not too much cuz they add rolling resistance at higher speeds). this will help the tire "bite" but isn't reccomended for daily driving because it'll make them wear faster.