First one, yep some models have that indefinite "classic" quality.
Phaet
hon has that in spades.
Second one, from the sol dominion, looks like a small brother to the Phaethon, but that is a good thing, since it offers some linearity and familiarity that ALL modern navies have.
Keep it as is. It looks "ordinary" like all destroyers or frigates finally look. They are not supposed to be quite pretty just good old utalitarian ships. Their "beauty" is in the way they fit in, become part of the picture. That's why I really like it.
Vasudan, hmm, I don't like it, too weird for me. But then that is just MY opinion. I 'm honest about it.
