+ The 3-6 Nagler Zoom is certainly nice and small and gives you sufficient power for what you are after.
- It is not necessarily the most comfortable ep to look through and only has a 50' fov - this is a real problem when using it at the 3mm click stop without a motorised tracking mount
+ The 3.5 Delos and XW provide 70' fov which is 'good' (not great) for following an object without a tracking mount and are supremely comfortable to look through for a protracted period of time
- These are probably the largest eyepieces in the Delos/XW range - not the biggest EPs in existence but they dwarf most other planetary EPs. Additionally, 3.5 in terms of magnification may not be sufficient for what you are after
+ Barlows/Powermates - Will certainly give you the power you desire dependent on what combination of EP you ultimately pick
- Tend to get a bit cumbersome and heavy having a train of EPs and barlows
It is little surprise that it is often commented that Astronomy is all about compromises in terms of getting one set of features for others
