I don't think I have enough words for Rotring ArtPens. I am in love with the set ever since my father gave me my first EF Art Pen. I refuse to do calligraphy (or write) with anything else. The pens are so ergonomic, they feel like they are a part of your hand. Or at leas they do for me. You can get them in various sizes. I am not sure if they do the same ink pumps but mine had a lever rather than the screw ink pump. No mess (do need a blotter for the nib). The best part is that if you aren't 'obsessively' into calligraphy, you can just buy the nibs and replace them on your pen.

Had these pens at college 22 years ago and they are still going strong today. Brilliant pens, brilliant ink, just brilliant! (via Rotring Art Pen)

Love to write and draw with my artpen. It never fails.