Hi guys! I'm contemplating on upgrading my hummer h3's sound system. it cam with the factory moonsoon system. I'll be getting a JL stealth box with a2150 amp.

my budget would be around $500 max with the speakers and extra amp for them.

I love to listen to r&b music and would like to have a good highs and mid bass.
I'm not familiar with components or anything so any suggestions are welcome. also a used system is ok with me so maybe you can suggest some nice system that are cheaper in used condition. Thanks so much!