My suggestion would be a 13mm Ethos but with budget and the fact you don't want 100deg, I would go the 13mm T6 Nag. Gives you mag ranges of 43x, 92x and 200x with your set, change from $500 and it is a really nice EP. It was my go to medium power EP for years in my 12". I alway think with a medium size dob you need an EP in the 90 to 100x range.
Eye relief is a little tight at 12mm so that could be consideration.
Malcolm
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