Why are people saying that mid-bass isn't important for music? It's 100% important for music! For drums the 40-100Hz FR is where all the magic happens. For kick drums it's the 40-60Hz range, with somewhere around 50 being the sweet spot. This is what gives you that nice chest thump.
Now, this is not to say that mid-bass isn't important for HT either, because it absolutely is. And fortunately for us, there are some fantastic subs being produced that are capable of giving you the best of both worlds, so definitely more options available now.
Since the OP is interested in music & HT, with music being the priority, I would suggest the Rythmik FV18 (paper cone), as it seems to be best all around value for his application needs/wants.
FWIW, I'm not trying to start a debate here. I'm just stating some facts from my experience in spending the better part of 15 years running sound for live bands and working in studios.
Hope this helps,
"Sticking feathers up your butt does not make you a chicken." - Tyler Durden
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