Yes, the unique class of equipment is the highest level item rarity. On level 33 I had epic equipment at best, by 42 (in FoV) had a unique cuirass, gauntlets, rings, belt and necklace (though later switched to an epic necklace, IIRC).
FYI, I did not use any charms in the game, but collected 5 lesser charms, 9 minor, 27 major, 56 blessed and 61 divine charms (7 of which were vitality, 3 spirit, 10 strength, 7 dexterity, 6 intelligence and 28 other).