Tim, I am about to upgrade torsion bars myself, and from what I have learned you do not want to install larger front alone. The name of the game is to go bigger in the rear, (sounds like a rap lyric),

, and the purpose of the larger front (21mm) is more to keep a balance w/ larger rear. As Thom says, you would actually degrade your handling w/ larger front only.
Those Elephant pieces are sooooo nice, wish I had the $$. They're actually not that bad, $$ wise, (and seem well worth it), just too many other things my car needs. (Or should I say I want).
All of the ER stuff is legit and well designed, but those bushings are the best thing yet from them, IMO.