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Bytor,
The reason you experience "blackouts" (also known as "kidneybean") with some eyepieces is that some particular designs have a lot of spherical aberration at the exit pupil. The larger Panoptics and a few of the Naglers were well known for this.
If you want a premium well-corrected (ie sharp) big eyepiece that doesn't suffer from this there are others, in particular Vixen's LVW 22, 30 and 42mm don't suffer from this and are otherwise similar to Panoptics, as well as the older LV30 and LV50. For something closer to 38mm, there's the TMB Paragon 40mm though Alex's experience suggests its not so well corrected in fast scopes.
Regarding your application vs price, I agree completely - there is no point spending big $ on a premium eyepiece if its only used a a finder.
Lastly 38mm is too long for an f/5 scope, the exit pupil will be too big. The longest eyepiece you should be considering is 30mm.
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