Originally I was going to do either the Hasegawa 1/72 Orion, JMSDF, in these markings (I always liked this one because the stylised "Orion" on the tail looks like a baddy from Scooby Doo).

Alternatively I was going to do this 1/72 Revell S-3 Viking

But now, do I do a what if JMSDF Viking?

Or a what if JMSDF SV-22J Osprey? (Both were real-world proposals - more what mighthavebeens, rather than what ifs).