So I'd like to upgrade my sub, but there's just too many out there to choose, and I don't want to end up buying multiple subs to "try out." My current amp is Jl Audio RD1500.1. My current box is 2.15 cu. ft. net, 33.75 in. sq., tuned @ 31 hz. I'd like to keep this box, but I could easily build another if need be. I listen to mainly hip-hop, and I don't like the term "loud" because for me I want to FEEL as much bass as possible, not just hear it. I want my bone cartilage to vibrate! So with that being said, does anyone have any first hand experience with any of these subs, and which would you recommend?