i'm hoping that they come up with an even rarer item. much like legendary items in WoW. they should make items that you will hardly ever see. In D2, most of the higher lvl chars had pretty much the be all, end all of items for that class. They should put a few jaw droppers in there too. Just my opinion.
but to answer the poll....unique should be higher than rare. also my opinion. rares and set items should hold you over until the end-game.