Depends on many factors, how big is your front sway bar? do you have good aftermarket suspension? stock? Stock struts with ebay coils? Race suspension?
If you dont have good struts/coils then replace those with better ones or Race Suspension such as Ksport Kontrols or Godspeed RS Coils. Then worry about a rear swaybar.
Do you want a more neutral feeling, as in removing understeer(plowing forward) or do you want more over steer(back coming out)
A good way to figure what you want for your suspension setup is to bulid your car In Forza Motorsports or Gran Tursimo. I Personally use Forza 3 and made a clone of my Delsol in it. Then Adjusted different suspension setups until I got one I liked how it drove. This will give you a good place to start.
For an idea of what sway bars hondas come with check out this list
http://www.honda-tech.com/showthread.php?t=1067180
Also Protip, The EG6 Sir was never sold in America. Just say you have a EG Hatch.