EzFlow master Artist 508 is the best brush for me. It is a size 8 but it does have a large belly in my opinion therefore can still pick up really large beads should you want to. It can flatten out into a paddle shape when required to press and smooth my product but goes back into a fine point whenever I need for precise work or perfecting smile lines. It's nothing fancy to look at with its wooden handle but it is nice to grip and I love that it has a metal cover to protect the hairs between uses.
It really is a superior brush.