Ah the path of temptation.... But since the two ethos eyepieces add up to around $1,300USD, which is quite a lot in NZ dollars, it makes them more expensive than her scope. So as good as these are, I think at this stage I will rule the ethos out due to price.
One thing on my side is that she does not read the equipment forums, so she may not even know about the ethos, so as long as no one at the observatory mentions them to her, I am in the clear!
As Jason and Graham said, she will be thrilled with the Panoptic and the nagler (or Denk). And it leaves me a bit of cash down to track for her Christmas present.... like the XW10.