It all depends on the size of the room. The bigger the room is, the bigger the subs you want. If I'm thinking back to my days of, oh wait, I like mad bass NOW haha. I'd just go with 12 inch subs and up. They just move more air and have lower bass for EDM, hip hop etc. Def check used, but a lot of guys overprice their bagged out crap so be careful. I'd just buy 1 more of those dayton subs, and move the one you have back and forth. Invest the cash into a more powerful amp and better speakers (maybe 4 bookshelf). You'll have 2 12's with good sounding speakers that get loud and you're set.