I would think Pure might be more on the scritchy side then you would want.
I just completed a restore with a 18mm Finest Badger Hair (original size was a 16mm handle) & was very impressed with the knot. It has soft tips, nice back bone & the knot I feel is comparable to a 20mm Knot. I did one awhile back with a Best Badger knot at 16mm but was not happy with it at all. They do sell a 16mm Finest now, but that would be a little on the small side at least for me.
Heres a pic of the 18mm Finest I just did.
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