I do have Faber Castell pens, a four pack actually (small, fine, medium, brush), but I've just recently started using a brush pen from Japan called Zebra. I got it from some professional comic artist I met when I was in San Francisco. It's like the Faber Castell brush pen, but smaller, and the tip is more firm. I like them both actually, but I tend to get carried away with how hard I press, and the Zebra doesn't make super fat lines when I press too hard.
I do like using small brushes, but I havent had to in a long time. I think if I had to do that, I really would go insane. You must have alot of patience to use one of those, heh.
And thanks, I like avatars that tell a little story.