Yeah, there's a bit of delusion running through some of the fanbase. The Skystriker, the Tomahawk, the Night Raven, the Whale, the Mamba, the Condor, the Demon, a (remastered) APC, and yes, even the Moray would all be ridiculously big. I love them all as much as the next fan but unless you've got yourself a mansion or ranch, there's just nowhere to put it all, not to mention how awkward they would be to handle and mess about with.
As to what I'd like to see that's still reasonable:
Joes: Silver Mirage, Wolverine, Sky Hawk, Conquest, Sharc, Polar Battle Bear, Devilfish, Desert Fox, Mudfighter
Cobra: ASP, FANG, Water Moccasin, Night Landing, Firebat, Thunder Machine, Wolf, Sea Ray, Dreadnok Cycle, Stiletto, Imp. AGP, Despoiler, Evader, maybe even a HISS II (man, I wish)
Maybe a Mobat or Mauler, and Destro's Dominator as Haslabs.