Drew, strongly suggest you try some before buying.
Evolution of eyepieces
http://www.brayebrookobservatory.org...fEYEPIECES.pdf
Depending on the type of telescope you have the image plane is curved, possibly convex or concave - see
https://www.telescope-optics.net/curvature.htm
You should choose eyepieces that suit the curvature of the image plane, for example Plossls (despite their simplicity) are an excellent match for Newtonians.
Similarly most eyepieces from Televue - their primary market is the US where big dobs are the most popular.
Conversely Erfles and SWA eyepieces have a strongly curved field which suits smallish refractors, but do not suit newtonians.
Vixen eyepieces being japanese are intended primarily to suit the scopes popular there which are refractors and SCT's, hence theirs are good for that but again not so good in fast newtonians.
The next issues are the choice of focal length:
- Maximum eyepiece focal length is about 6mm x the focal ratio of your scope, eg for an f/5, 30mm eyepiece.
- Minumum eyepiece focal length is around 0.7mm x the focal ratio of your scope (newtonians and SCTs) or 0.5mm for refractors.
Lastly the actual field of view (set by the field stop diameter), and the tradeoff between large apparent field of view vs large eye-relief (you can have one, but not both simultaneously). These are up to you.