Two very different legends make up 1:550 ship model kits: the ocean liner Titanic and the Soviet aircraft carrier Kiev, which can also be built as her sister ship Minsk. Titanic comes out at just under half a metre at this reduction, so she stays genuinely displayable while still showing four funnels and the promenade decks in decent relief. It is a small shelf, but a memorable one, and the scale turns up mainly on hand-picked subjects.
If Titanic in another size appeals, she also appears among 1:600 ship model kits; further liner and warship subjects are indexed at ship model kits. Railings do more for a liner than any other single upgrade, and you will find them in ship model accessories.