If you've got a (big) spare room available there's always the 1/72 C-17.
1/72 scale Boeing (McDonnell-Douglas) C-17 GlobeMaster - Tacticak Transport [sic]
(Anigrand also produce a 1/72 C-5 and 747 if anyone fancies getting divorced)
Personally I
think I can get away with a 1/72 Apollo 11, all 5' of it, because it takes up very little floor space.