Go with the Greddy Evo or Power Extreme if they still make it. Greddy makes a solid product that actually gives you a few ponies. If you want speed out of that CX, you're gonna have to save for a motor swap (i.e. B16, B18, B20 hybrid, H22). I had a 94 Si hatchback....way back when. Was in the Honda scene for a little more than 12 years (yes, back when the mustang guys would laugh at hondas - until they got smoked). Set up a budget and ask yourself what your goals are. Are you going NA, turbo, nitrous? This will help you when buying parts. PM me if you have any questions on that car. I know it inside and out. Another exhaust to look at that works well on civics is Tanabe. Stay away from the Racing Medallion....very ricey.
I use to have alot of hook-ups on Honda stuff but have since been through 3 cars, none of which have been hondas. Have a 350Z now....doesn't take alot of money to make this thing fast. lol