I think it's a lot of money for a little gain, but your opinion may differ.
Before I spent that kind of $$ on stabilizers (anti-sway bars?), I'd try a Davis Tru Trak or Henderson Track bar (panhard rod) for about $350 and install it yourself (not hard at all). It might give enough improvement that you will forget the rest.
2004 American Tradition; 2014 Buick LaCRosse
Homebase in the Ocala Nat'l Forest near Ocala, FL