All of the JL subs are excellent performers - and their pricing reflects that. Bear in mind that, while there are tons of expensive high end products that are mediocre, the JLs actually -IMHO- largely justify their price tag.
I've seen test results that indicate that the SVS subs are about as good (for dual use music and HT) and much less expensive. They are bigger and the finish is not as nice as JL. Caveat: SVS recommendation based on word of mouth and tests only - not auditioning. OTOH, I've heard most of the JL line and came away impressed.
Importantly - if you take the time to optimize location, 2 mediocre subs will almost always produce much smoother response than a single great sub - generally better for music. The single sub may go deeper and reach higher clean SPLs, however - generally better for movies. Pick your poison. In this case, I'd personally go with 2 110s.
Good Luck
Marty