I owned a set of SAM monitors as well for a while great speaker too for what they do. best sound staging I have ever heard in my system.
I'm still thinking of the SAM high output's floor standers as a contender. just would like more bass but hard to do everything in a single driver.
Voxative are high on my list to listen to for single driver systems. maybe the Pure Audio project's open baffle system with a Voxative main driver would be interesting to listen to.