i would be interesting to compare 2 FV15 to the JL sub
I'm saying that with music I think one F15 will beat the JL for music.
That is assuming that the F15 is not being pushed beyond it's output capacity (which depends a lot on the room).
If your experience is like mine, The JL will sound richer and fuller, but the Rythmik will be more articulate and clearer. Also, with the E112, I experience things seeming to lose control when it is pushed hard in the 20's (Hz).
I think the JL will do better for the explosions and dinosaur stomps of HT.
But, regardless, you have some good gear, take the time to listen and compare with different types of music. If you like the mid-range or high-frequency character of the Salons more than the MA's we can probably direct you to a better option for your main speakers and you can use the MA's for your rears.
f you plan to have two subs, I would recommend a Denon AVR-X4000 for the HT and teh Yamaha for your 2.1.