Omega single driver speakers

Not about Omega particularly, but I think single-driver speakers are more about what you don't get.  You don't get amplifier clipping, crossover distortion and time smear and stuff like that.  I think it's something you either appreciate or you don't.  I have a pair of Fritz 4.5" Fostex speakers that I think are just great for what they do.  But I also think they work best with low-powered tube amps, but that's me.  You should definitely try a pair and see if they have what you like.  My speakers now are too big to move around, but when I had my monitors, I used to switch them up with the Fritz every once and a while and it was really fun.  

I have a pair of omega super Alnico monitors and I absolutely love them. 

Maybe it’s the crossover less design that lets them flow effortlessly.  I added a sub and it is perfect. My Eml 45 mesh tubes sound spectacular. 

Even streaming tidal mqa from dcs bridge is incredible. 

Ffzz , what sub did you add.I have omega 3xrs and was thinking of adding a sub but wasn’t sure if I should get a rel 7i or a less expensive sub such as a rhythmic or speed woofer 10 s would do. 

I didn’t go to the single drive speaker route at the end.

I certainly would not. 38 hz to 20kHz? my back side. Bass is very disruptive to higher frequencies. It will cause distortion particularly at higher levels because of the long excursions it takes to produce bass.
In order to limit excursion you have to use a very big driver or many small ones like Bose 901. Even speakers that can easily run full range like big ESLs should have the low bass taken away from them. Next, a driver that size is going to beam high frequencies like crazy. I am all for controlled dispersion but in order to hear anything over about 12 kHz you are going to have to be dead on to each speaker. 
If you really want a single driver speaker you get ESLs and put subwoofers under them. Trying to do it with dynamic drivers is highly problematic more so than using multiple drivers and crossovers.