Re-Welcome
Anyway, congrats on the purchase. The green ones are nice and very very rare. Congrats on the first kill.

Silly Honda.
It has all been said already. Replace the HU first and see how it sounds (Best thing you can do), then if you want to go nuts, add a sub. This is sufficient for nice sounds.
I just purchased my CSVT also for a daily driver. I love her so far!! Stereo system going in today. The stock is sub-par at best.