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Bintel, ie GSO, plossls are a good way to get started with a comprehensive set of EPs without spending very much money at all. e.g., 32mm 20mm 15mm and a 2x barlow. The supreviews esp the 1.25" ones are no good for fast Dobs IMO. The only one that might be worth considering is the 30mm.
My exp with GSO plossls 32,25,15 and 9mm: the 25mm is the best, followed by the 32mm which vignettes slightly (barrel intrudes on field stop), 9mm is good but tight on eye relief, and 15mm is the weakest of the lot with narrow FOV and/or poor illumination, ie. vignettes quite severely. Never tried the 20mm.
IMO by far the best value premium EPs around for f/5-ish dobs are the Pentax XFs 8.5 and 12mm, available from Frontier Optics. With a good 2x barlow and you will have mid-to-high powers, deep sky and planets, covered. Add one more low power EP and you'd have all occasions pretty well covered.
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