I agree on the borg ship. The one thing that stands out in the game is the fact it's ugly white, with flimsy cellophane windows. Paint it with whatever borg colors you like, trow in some green windows and/or LED flashers and you're set.
That, and the fact they went with the one-show special ship, and not the borg cube. That would have been better. That's a whole different mod in itself, and however it would be cool, all artwork or display images would be off.