I love all brushes for the most part, not a big fan of boar & no real desire for a synthethic. In my brush collection there are 3 that stand out above the others in the comfort, softness & the way they work the lather. If you asked me what the badger quality rating was, I would have no idea. I try to read the brush charts , but find them a bit confusing.
The brushes are :

Edwin Jagger-- my very first brush I got lucky,,

Name:  Edwin Jagger Badger Brush.jpg
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Name:  Edwin Jagger Badger Brush (3).jpg
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A T&I Custom,,,,,,,,

Name:  Thiers-Issard Custom Blond Horn & Badger.jpg
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Name:  Thiers-Issard Custom Blond Horn & Badger 2.jpg
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A William Barber Custom (Pixelfixed), this one never leaves the rotation,,,

Name:  24mm Custom Musk Ox Horn Lignum Vitae Officianale Fossil Walrus Ivory- William Barber (7).jpg
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