You described it perfectly. I have the same setup with the vibrant resonator. I love it. Catless dp makes a huge difference in the drone. My girl hates it but oh well lol
This one fits stock but is better. Plug and play.
Rockford Fosgate P3SD4-8 Punch P3S 8" 4-Ohm DVC Shallow Subwoofer https://www.amazon.com/dp/B007AQ2WU8/ref=cm_sw_r_cp_api_i_NehbDb7008SXN