Unfortunately, the only really "special" cabin we've been in (other than suites) was on the currently-out-of-service SS Norway. On the Norway and Viking decks are the former first-class cabins of the transatlantic days.
These cabins are truly huge, bigger than any suite I've ever seen. And they're priced as deluxe outside cabins. We were in N-131 last January, a 324 sq. ft. outside cabin with 2 bathrooms (one with a bidet), a beautiful mirrored dressing table and loads of storage space. And some of these cabins have even more space than ours, up to 350 sq. ft! Ours was definitely a special cabin on a very special ship. Let's hope she returns soon.
Baltic Sea, Aug.'04