With Axioms subject to price increases I was considering buying my rear speaker now and putting it away until I need it.

Presently have: M40, VP100, QS4.

Options:

1. Another QS4

2. An M3ti

3. Replace VP100 with VP150 and use 100 for rear.

4. Option I haven't thought about but you have.

The back wall is fairly close <6ft. from most of my listening positions.