I think the Romulan Dyson ship is the best looking of the three:
And here is my new Fed engineer, Mantis, whom I am grooming to excel at cruiser command. I have his back story as being half Andorian and half Romulan. Meaning 2 Romulan parents and 2 Andorian parents, going with the 4 gender version of the Andorians in Trek lit. And I really like the look of the Khan-era uniforms with color as a highlight instead of a feature.