[Wavytone]

Dave in short the best thing you could do is attend a few star parties and try a heap of eyepieces in your scope to see what you like vs don't like.

The main issues with eyepiece choice are:

1. Magnification how much is enough vs not helpful (at the high end); you've sorted that one;

2. Exit pupil (at the low, wide field end);

3. Whether they produce "Kidney bean" blackouts or are very sensitive to eye position; this is due to spherical aberration at the exit pupil. A few eyepieces were notorious for this;

4. Whether the eyepiece is a good match for the f-ratio (applies to scopes f/5 or faster, not an issue with SCTs at f/10). More importantly many budget 70- degree eyepieces (eg Prostar) work perfectly well in SCTs.

5. Field curvature of the scope vs that of the telescope. You can google the field curvature of Newtonian scopes Vs that of refractors or SCTs and Mak's for yourself. This one is the reason why the humble Plossl - a very simple eyepiece - works surprisingly well in fast Newtonian scopes but is not a particularly good match for an SCT or refractor. Ditto Koenigs. Eyepieces that suit refractors will also suit SCTs and Maks.

Most Japanese eyepieces - particularly Tak And Vixen - are aimed at refractors because the same manufacturers also sell mostly refractors in Japan, not newtinians.

6. Chromatic correction - specifically lateral chromatic error near the edge of the field of view. In a reflector, Mak or SCT, these scopes are fundamentally reflectors aside from the corrector being used to direct spherical aberration. Off axis stars are not smeared into colourful blobs by the objective, yet if stars are smeared into rainbow streaks. you have a poor eyepiece.

Lastly some eyepieces are specifically aimed at users of fast newtonians to the extent they deliberately include either or both some field curvature, and/or coma. Examples include Edmund RKE's which were designed to match a small f/4 Newtonian, and I have seen two recent eyepiece types which specifically state they include negative coma to suit newtonians. These - and Plossls - are not a great choice for SCTs.