I have started using DaVinci 5080 brushes (30mm and 50mm), it has been almost a month I think. It was tricky at first to learn uniform coating with optimum amount of sensitizer. I cannot complain about its softness, I never had the chance to compare it to the other brushes mentioned.
I use davinci brushes with various papers some roughly textured and some with smooth surface. I do not plan to try any other brush, I cannot imagine how things would get any better.