National Association of Independent Artists
Begun in 1995, the National Association of Independent Artists (NAIA) is a membership-based 501c6 nonprofit trade organization that serves to enhance the economic well-being of people who exhibit their artwork at quality outdoor and indoor art and/or fine craft shows, encourage creative expression and artistic excellence, and expand public awareness, appreciation and acquisition of fine art and fine craft. Further, the organization serves as an advocate for artists. It is committed, by positive and cooperative means, to promote improvement throughout the industry. The NAIA has become the artists' collective and most effective voice as it continues to grow and gain recognition. The organization is led by a dedicated volunteer board of directors, volunteers and advocates.
I've been using Koh-I-Noor Rapidograph Technical Pens since 1969. My aunt bought me my first set when I was 12 and I have used them daily ever since. I love the fact that I can mix my ink colors to match my watercolor or my wardrobe and use "Pelikan Drawing Ink A" almost exclusively. Though the inks made by Koh-I-Noor and Winsor Newton are satisfactory.
If you are a beginner, I would NOT recommend purchasing anything smaller than an 0 (0.35 mm). Even as a professional I find cleaning a 4x0 to be a challenge. I work most often with a 2x0, and find them to produce the smoothest flow, if kept clean.