I like the XX a lot, especially the Aeronavale (no date) version. I want one. I really love the look of the Sub, so perfectly classic, but the Type XX on a strap has a proportions and a feel that would really work for me as dress or casual. It's also a lot cheaper than the Royal Oak, so I'm not sure they can be compared.
Anyway, this is TWAT, so the correct answer will always be "all of them".