Stormrage, what unit(s) are you using for Imperial Guardsmen? And what specific regiment is being represented, or is it a general-purpose guardsman unit?
I'm looking at half a dozen different units right now for about ten different regiments, and it's a bit mind-boggling.
Energy sounds good for trade, by the way. Dawn of War actually has two resources - requisition, gained by holding points on the battlefield, and power, gained by building generators. Energy strikes me as a nice amalgamation of the two ideas.