Best realistic omni type speaker option?

Duevel is very possible to get in the US, just not a demo. I can vouch for Pascal Ravach of Mutine in Canada, the North American distributor. I purchased Venus last May, love them.
As to other Omni types I have owned, various Ohms, very good, Larsen Model 4, also very good and reasonably priced, Shahinian Obelisk and Larc, both very good. 
All of the above while “similar”, have certain things each may do a bit better. It all comes down to system, room and maybe even visual things. 
Honestly, I could have lived with any of these, but extremely happy with my Duevel Venus. Also, my Venus were not as expensive as one might think, Pascal does an excellent job of keeping pricing in line with current German exchange. He does not utilize the typical BS distribution mark up, something that I am very impressed with! 
By the way, I am curious about how you are using your Davone Mojo’s, size of room, placement, amps etc. I have often wanted to try a pair in my bedroom along with my Naim Uniti streamer, always thought that might make for a nice and simple setup.

br3098-I would mirror your comments on the Shahinian Obelisk. That was one of the fantastic traits of them to my ears, the layering of music, a real depth, they had an uncanny way of making a vocalist or instruments have real 3-dimensional body. Not overblown and everything all over the place as some do. If I could have only gotten the lower mids and bass end to work in my room, there is no doubt I would still have them and not ventured on.

One slightly negative thing to me, and this was for me typical of the Ohms and Shahinian, is they seem to require more power/drive level to “wake” them up. This is something that the Duevel Venus do so much better, they play at lower levels with seemingly less loss of detail and impact, and for me now living in an apartment, just works.

I still am very much a lover of the Larsen’s too, will always throw them out as a recommendation to those looking for unobtrusive, great sounding speakers with an Omni-type presentation.

Yes, the GamuT integrated would have been superb I think! The Obs certainly like the current a good amplifier can deliver, providing it sounds good, of course! I am sure you will manage! Enjoy!