My current setup is composed almost entirely of in-wall speakers, with the VP180 being the exception. It just occurred to me that I could have gone with M5HP on-walls for the left and right channels.

Low frequency performance aside, would I gain anything by having on-wall M5HP's instead of in-walls?

Axiom M5HP VP160 M3 ADA1000
Anthem MRX 720
SVS SB-3000 (dual)