with the exception of the k200 - delta.
they are pretty much all the same. So go for the one with the most features.

I don't recommend the k200 as a first printer. takes a while to get it dialled in - so better get experience with something easier first.
That said - I love deltas :-) and my k200 has been a total workhorse.

If you want a delta for minitures go for the monoprice mini delta.
100% plug and play and only $160.
wifi, auto level - set mine up on wifi in about a minute.
Going to change the 0.4mm nozzle for a 0.25 for detail stuff.

so maybe an ender 3 and a monoprice mini delta :-)
So the mini delta for the minitures and the ender for your wife :-)
Believe me you can't have too many !