You might look into Copic for a smaller pen. I've heard they're nice. Pigment based inks. They have .1 ... I can't get them around where I am and haven't gotten around to ordering online yet, but there are one or two other mappers on the guild who use them to wonderful effect.

The mountains are beautiful. Your forests are nice too... they just triggered a hilarious day from my past. I didn't mean to be critical. My sense of humor is deplorable and awkward and I usually regret voicing it... sometimes it's half-voiced and that's immeasurably worse. I'm going to be my non-digital self now and keep my mouth shut.