That was my take on the Spatial Audio X3. The midrange wasn’t fleshed out and “real “ to my ears.
That speaker can be quite revealing. What amplifier were you using?
If you have the room to set up open baffle speakers the soundstage can be impressive. The speakers have to be at least 5 feet from the wall behind them so the ear/brain system can interpret the late arrival information (reflection from the wall) as echo location information instead of harshness.