MajorRacal, part of the UnityTeam, does very nice work ... low polygons.
We added these two to Unity V3.0 and four others that flesh out the Borg race.
V531 has some uber settings for Borg, and we are retiring the race as non-playable ... at least for a few maps.
There are 54 Borg ships in Unity: The Third Age, many made by KnightFrieza and KnightIceman.
Here are some of Racal's recent works.
Downloads are in the Unity Borg section. These ships were used in UnityV2.5 and V3.0 with more to come.
http://www.stcd.sgnonline.com/users/trimodyards/unityyard.htm