I'm curious as to this turns out too.
I'm guessing you've already put the Dahli's in place and didn't like the results?
waht didn't you like?
Tried both walls or are you relagated to only using one? Which?
My vote is for monitors, or mid sized speakers.
Prior to making the switch though, I'd introduce some room treatments to suck up some of that bass , and some diffusers to eliminate some reflections.
Getting new/different speakers is always such a hassle when your rig is already very good or better. usually it takes still more changes than a simple swap out of loudspeakers.