I agree with Jules, having a physical model is in any case far better than a mass of polies and trigons. The physical model is something you can touch, you can look at to think, to get inspired by. Beyond that, it can help you scale properly. Didn't anyone notice that the shows, films, whatevs done with models are far more realistical when it comes to scaling of different ships and different objects than the CGI-based shows, films, whatevs?
CGI may be great to allow making such wonderful ships like the Sovereign, the Insignia, the Scimitar, the Borg Unicomplex, and whatnot (games would be virtually nonexistant to start with...). At least the latter two would be nigh to totally impossible as models. With the Borg, scaling hardly matters though, everything is supersized. But what's in it beyond that? Imagination? You first need to render a scene to make a picture, you cannot touch it and wander across the surface with you mind or your hand.