Boeing Model 314 Clipper (C-98) in 1/48th scale would be nice.
Do you want to model it or live in it?
1/72nd AMX
1/76th post war British AFV: FV432, Ferret, Fox, CVR(T) variants other than Scorpion and Scimitar, decent Centurion.
1/600th or 1/700th decent Leander class frigate.
Some more US and Brit paper-plane what-ifs: it seems like a German designer only had to scribble down the results of a bad night after too much beer and a dodgy bratwurst for it to be eagerly kitted, but you only get a smattering of the US and Brit ones that even flew, let alone the pure paper ones.