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Keep an eye on the classifieds. You just missed a 20mm ES for $270. I bought all my premium wide-field eps though the classifieds (and deep bows to ep recyclers).
FWIW I suggest fewer good eps and I'm not too fussed on barlows. Maybe that's just a hangovers from too many cheap barlows. About you low power ep, if your pupil can open to, say, 6mm then the lowest useable mag = 300/6 = 50x. Assuming your 12" is f/5 then your widest ep would be a 30mm (or31). The 31 Nagler was beyond my budget so I wound up with a WO 28mm UWAN. I haven't done a side by side comparison with a 26 or 31 Nagler but it looks dang fine to me. It certainly doesn't lose much to my excellent 20mm Type 2. I spaced wide-field my eps in the ratio 3:2, so 28-20-13-9. That covers all bases. Then I have UO orthos for the planets.
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