Thanks for all the input everyone. Much appreciated.

I've decided on moving the M22tis to the front and buying a sub.

Now for the other question: Do my AX-5 towers become surrounds or rears or do my AX-2 large bookshelves become my surrounds or rears...

Thanks for all the input.

Pioneer 1018, Optoma HD65, LG BH200
Axiom m22ti
Mirage OM-C2
Axiom AX-5
Axiom AX-2