Get rid of those 200Hz line filters. A 6 1/2 should easily go down to 100. Do you have a crossover on the amp or headunit? Try to get your crossover point somewhere near 90 or 100Hz. If you are going to crank it up a lot, stick with 100Hz.
3 1f Caps? That's quite a lot. I'm hoping you shopped around and had an idea why that many was important. I'll bet someone mentioned that you'll want 1f for every 500 watts, maybe. No worries. I used to work on car audio a lot and going form no caps (yeah, back in the day....lol) to just one 1f cap was eye opening. Quite a surprise.
If available, do not use an asymmetrical crossover.
As for improvement, I always suggest upgraded cables. Even some entry-level home cables will make a difference. Try some AudioQuest stuff. I used AQ F14, and it completely smoothed out my high/mid sound. The cable is flat, so it runs under carpets really well. You can also upgrade the interconnect between the head unit and the amplifier. Find a home audio place that can build cables to custom lengths and have them build you one for the car.
Finally, you might think about Q-Logic QForms. These will place the front speakers down near your feet, and fire up towards you. I wont go into why this makes such a difference, but it has to do with what is called path length differences. It can make a good stereo great. I'm sure there are models for Hondas.
Good luck, and have fun!
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