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Col, a 13 mm Nagler would give good views of the planets, and a crisp wide field of view for stellar objects and the Moon. At 92X, the exit pupil would be 0.86mm and the actual field of view would be similar in degrees! (This oddity is because the lens in mm is about the same at the apparent view of view of a Nagler in degrees.)
The 13mm from memory is also the lightest Nagler so is the least likely to upset the balance of the scope.
Other options: 11m Nagler, or any plossl or Ortho in the 11mm to 15mm range.
U could also buy a 6 to 9mm Ortho if you wish to split close double stars and really push limits on viewing planets.
A 30 to 35mm plossl is all you need for widefield viewing. It may be best to burrow and try widefield EPs first, as the baffle(s) in the scope may restrict the field to a less usage proportion.
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