I love the Cat Cosmetics kabuki brush. It's quite small and very plush, and I use it for mineral makeup, powder, and blush (with a very light hand on the blush because the brush is so thick). They're out of stock right now but are 30% off until the end of March (discount will be honored if you sign up to be notified of its arrival).

Their Open Sesameow is also pretty impressive for travel, keeps brushes neatly at hand when traveling, especially if you're working in front of a mirror with no surfaces to set things on.