Thanks everyone for all your great advice. It's certainly given me food for thought. Looks like it's down to the Radian/Pentax. I'd be happy with either! But the Radian is not as expensive. I've noticed a strong similarity between the Pentax design and the new Meade 5000's... mmm... interesting...
I'd really like to try out an Ortho. I used to have a Unitron 6mm Ortho and it was a nice eyepiece... but the eye relief of these newer designs is very attractive.
I like the 8mm focal length of the Rad. I think going lower (like the 7mm Pentax) might be pushing it for a 'general purpose' high power ep... it'd be more like a 'special-rare-nights-of-excellent-seeing eyepiece'.
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