Re: Which brand of oil painting brush is best?
I am still a newbie with oils, so my brushes haven't had much wear and tear yet but I love the W&N Monarch brush I've got - it can take loads of punishment. Just gotten Escoda Mongoose (Tadami I think) and that seems similarly nice.
For hog/bristle I found so far my very old W&N Winton brush keeps its shape better than my brand new Escoda which is already loosing its shape after a couple of paintings/cleanings.
So I vote W&N but there's no years of experience here!
Da Vinci I find hit-or-miss: some are great and some loose their shape immediately.