Slap in a Hotchkis TVS (total vehicle system), Upgrade your wheels (I like 16" but I think I'm the only one here that likes 16" wheels). Get some performance rubber.
That is a cost effective way of building solid cornering ability. You can buy the Hotchkis TVS all at once or a little at a time.
Other options are out there like replacing the entire front suspension/K-member with re designed units, at significantly more cost.
http://www.hotchkis.net/
