I asked Rob Teeter the same question when I bought his 16" f4.5 he used for outreach and he recommended the Nagler 31mm, and Etho 17mm, 13mm and 8mm.
They have worked spectacularly for me for the dobs ans well as for my other telescopes. Truly great eyepieces.
This sounds like awfully good advice!
As you've likely noticed, some Dobbers are fond of the ~20/21mm 100° spot for their viewing, others the ~17mm spot.
Then there's others:
... The only 2" eyepiece I really use is my 21 Ethos, and even then it's rare I use it since I'm a power junkie, and prefer higher magnification than lower magnification.
I find myself a bit closer to CrazyPanda's camp, my go-to EP in my Dob (very much similar to yours) is a 13mm Ethos (153x), and i typically work downward from there- 10mm, 8mm, 6mm E's. I have a 20mm Lunt 100° HDC (same as the APM 'HDC'?), and i'd agree its arguably a bit better than the ES version- for my concerns it's notably less poundage & balance concern! But it doesn't see nearly the use the others do- and is often the first-look EP for big+wide stuff before diving in for closer peeks.
Much of this is individual preferences for viewing- but a Dob like this lends itself quite well to a wide variety of tastes; it can go w-i-d-e, it can go deep, and if seeing, collimation, and optics are up to it, it can magnify quite well too! So a BIG part of your question would be what do you like to look at? Get EPs that suit that viewing.
"Used" is a seriously excellent way to go about this, too! Also, backing down to 80° EPs to begin with makes piles of sense, as you can use/enjoy them to learn better what & where your personal tastes & viewing patterns with this new scope are taking you- then amp things up to 100° EPs in those specific areas, and build/refine from there. Those "used" EPs you started with can always be resold for about what you paid for them, so they'll amount to, essentially, free or low-cost-rental test drives.
The other thing that's worth mentioning, particularly with 80° EPs in a fast Dob, and especially with 100° EPs in a fast Dob, is coma-correction! Prob'ly sooner than later you should consider looking at a *used* older model ParaCorr. The outer field of view in these widefield EPs you are seeking will clean-up noticeably with a P/C in place. Some will use it, others are okay without.... but the aberration of coma is definitely there in a fast Newtonian's view! About halfway down this page is a decent example of this.
Congrats on the big Dob!