> What I need to know is, are there six such Items of Extra-Specialness (weapon, helmet, armour, shield, gloves, boots) for each class, or will I be wasting my time looking for some of them?

That will be a lot of wasted time. There are two class-specific items for each class, although these items are not necessarily evenly distributed amongst the different equipment categories. There are also some other non-class-specific items with similar kinds of bonuses. If you manage to find all the class-specific items, I'm sure you will have also found all of those, too, but if you're in doubt, holler (or email me if I miss it in this forum) and I can check your game to make sure you found everything.