Lots of good stuff already mentioned. The Monogram classic kits do omit some fine detail, but all the shapes are right, and they still build up into nice models. THe MPC 32 Imperial looks good, though it it is pretty fiddly. If you want some European subjects, Heller has some very nice subjects, though in their quest for scale appearrance can mean some very delicate parts. For more recent offerings there are Tamiya's Toyoda Model AA and ICM's Opel Admiral, though I haven't built either of those, so I can't say what they're like to build.