I'd stick with 2" barrels and get the 20 14 and 9mm ES....and as I have these three can say they are nice eyepieces. Get a 2X 2" barlow. The ES 8.8 82 isn't IME as good as the 9mm. Had the 8.8 too.
If you get the GSO 2X barlow the lens screws off and screwing it onto the eypieces is a 1.5X barlow...just a thought.
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