1) fewer high quality eyepieces are better than a lot of mediocre ones
2) You need more eyepieces at the high power end than the low/medium power end. You certainly don't need a 35mm, 25mm and an 18mm eyepiece with a 10"/F5 dob. When I use my 10" dob, I usually go from my 27mm TV Panoptic straight to my 10mm Pentax XW when observing DSO's.
I would look at getting a good 2" barlow and a 30mm widefield eyepiece of good quality. Barlowed it gives 15mm. Then add a 10mm and a 7mm or 8mm eyepiece, which will both double for high power lunar/planetary work when barlowed.
Cheers,
John B
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