I have been swapping around eyepieces in my 12" for a little while now
I think all of these do ok in a longerf/l refractor
So far its been
27 panoptic
28 pretoria
16 nagler
14 xw
13 nagler
7 nagler smoothie
8.5 xf
27 pano is a great eyepiece very crisp across most of the field and very comfortable to use.. I bought the 28 pretoria which i
cant sell So i let the pano move on ..
16 nagler is a much underated eyepiece imo in my 12 " it was great
comfortable eye relief has become a major issue for me off late so this one went .
13 nagler great eyepiece again eye relief made it a little uncomfortable over time so regretably it went away .
14 xw replaced the above .. eye relief.. wow of a view .. but I sure notice the narrower fov
yes I know about that other one...( ethos free zone)

7 mm nagler .. very nice views E/R though tight still seems comfortable to use with this one for me
the killer was when my 12" got done the magn was a little to much to often.
8.5 pentax xf .. great eyepiece.. gobs of E/R and a little kinder focal length for a 12" scope imo
though seeing round my way is rarely supportive of this magnification so for the price having this one around isn't a big
ask if it dosn't do much most of the time.
But you have a nice refractor on the way ?... So if imaging is path you might travel dont buy stuff
As For visual observing the above are at the top end dollar wise of what you can throw into the optical train.
If your unsure about where you want to go wait a little while ...the eyepieces you get with these scopes
will serve you well and maybe save you a few dollars.