Larry, welcome back. Those Axioms that you've selected should be excellent. The QS8s will be side surrounds, so where in relation to your listening position are those JBL ceiling speakers? The positioning might not really be suitable for the back surrounds.

Fine choice for your receiver.

As to the subs, keep in mind that they can be positioned just as well lying down, so the 24" width available doesn't necessarily limit you to small subs.

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Enjoy the music, not the equipment.