[Bill 1ss/rs m6]

Ok. I have my stock BA system with the ******** harness. I am running a memphis 500 watt class d amp @1 ohm into a 10 inch kicker cvr aluminized sub in a sealed enclosure. It's a dual 2 ohm voice coil, hence I have wired it to 1 ohm for the amps full 500 watts. It sounds great but I want to run 2 10's. Question is I notice a huge gap between good subs that need decent power and great subs that need gobs of power, Anyone have any advice on what two subs to run with my amp. I know I want dual 4 ohm so i can wire them down to 1 ohm. My friend loaned me the current kicker i am using. Please discuss...