I beefed up my rear sway bar by going w/ an '04 TL, from an Acura dealer, and left the front alone. Very neutral handling.

For the rear, you'll need brackets and bushings according to the diameter of the sway bar. Chances are, if you buy the bar from a dealer they'll have the bushing/brackets too. If you live where rust happens, you may as well save yourself some grief and spend the money for new end links right away. They're almost impossible to get off, due to the allen-wrench bolts. When I saw that I was getting nowhere, I got out my sawzall w/ a metal-cutting blade and sawed through the end link threads. That's on a '98, but I'd guess yours are similar. Sorry I can't help you with choosing a sway bar. My stock sway bar is supposedly a 17mm diameter, and replaced it w/ a 22mm, so I'd suggest something in that range- 22mm- 24mm.

 

I believe that the Progress bar is the largest at 27mm, but I could be wrong. After all, I don't even own a Honda!!!