My current favorite is a Raphael size 1, small enough to give me precision, holds a decent amount of paint but not a huge amount. Lovely point. Size 00 works well for the tiny dots in eyes, but is too small for anything else. The salesman was pushing DaVinci's but I couldn't get mine to hold a point worth a darn.
I was amazed how much my painting style is handicapped by the difference in humidity in Denton... Suddenly, the paint was drying so fast! And other people from still drier climates were complaining that paint took forever to dry.
Edited to add: And for cheap synthetics for metallics or other abuse, Jerry Q Detail Brushes. The liners are what I use, and you can get them cheap.
Don't they know air is supposed to wrap you in a warm, humid hug when you step outside? This stuff in Denton is so dry it's practically a gas! What do they think gills are for? Kids these days...