Seeking advice on ship

So a while back this community was super helpful in getting my two ships (two groups) campaign off the ground. It’s going great! It’s going so well that we are looking to expand to another group with additional players.

Right now I have a Akira class with DS9 vibes and a Luna class with TNG + SNW vibes. So what would be good for the third ship? I want something that will support Voyager+Discovery vibes but not be married to their specific plot lines. Some science-forward stuff, some “on our own” moments but without the lost-in-space theme that Voyager had.

I’m debating between Nova and Nebula. Both have some good flexibility. Both are ships that have shown up on screen without being hero ships. What do you guys think between these two for a science forward ship that must stand on its own at times? Also, am I missing another post-Nemesis era ship that might be a good fit?

Thanks!