Once you've lived with planars, it's very hard to go back to boxes.
Among the few non-planar speakers that I find satisfyingly un-boxy is the Gradient Revolution, which really doesn't use a box. The woofers are dipoles, and the concentric mid/tweet module is mounted in a generouly free-flowing pressure-relief enclosure. So far my Revolution customers have included at least one former Martin Logan and Quad owner.
In a more conventional approach, Talon makes some very fine loudspeakers (which I don't sell).
The InnerSounds are also very dynamic and lively, though their sweet spot is pretty much limited to one person under normal conditions.
Best of luck in your quest!
Duke