Ebony is supposed to be the 2nd best armor, 1st being daedric.
http://www.uesp.net/wiki/Skyrim:Armor
What is your blacksmithing skill? This is interesting because the base armor of the orcish armor could be stronger because you crafted it.
i cant exactly remember what my skill level was when i made the orcish set (i made the full set of armour at the same time, excluding weapons because i was using really good ones)
but i 'think' it was the precise level needed to craft the stuff. id just leveled up and immediately made it iirc
so it would 'appear' that crafting stuff actually is better than any ordinary equipment you find. i wasnt aware of that but would like more input if thats actually the case.
i will also add that the orcish has a minor enchantment on it (+20 health iirc)
does enchanting also increase the armour rating? my enchating skill has no perks in it, and its relatively low.