Sometime I think it would be better if the brand-specific prizes where not categories but special awards. Like, one could enter a piece in single miniature, and be also competing for the same entry for the "Exodus Wars Best of show", or the "Onslaught miniatures best of show" Award (or Microworld, or TMG, or even GW if they want to sponsor a prize

).
The normal categories would run as usual, but miniature makers could decide to sponsor a special prize for the entry of their choice featuring their production. I think it would make the categories easier to read and still allow miniatures makers to promote the showcasing of their production. I would even think it just to allow the miniature maker to judge for their own sponsored prize - it is less "democratic" than the usual voting process, but after all they are providing the prizes !
Of course, it's totally up to them, I'm just tossing the idea.