I did change my original rear sway bar for a 18 mm one. I just add Whiteline links to the rear sway and front. That gives you a faster control with the direction... Suggest you to do that mods.. before changing your suspension.. You will see a big difference with that. But you will have to change to STS Class..
The new Moffa aluminium links could be also a good choice. Check in the Ads bulletin board.