Great subs

I have 3 of these subs and I love them I have enjoyed them for a year and they are still like new I run two of them in a sanoma ext.cab truck on a 2500 watt RMS amp. I'm currently working on building a new box and would like to improve on my last box. What are your recommendations for optimal bass but still musical. l listen to country rap and country music and hit hard and loud.