I have the Pro 9000II, which is the predecessor of the Pro-100, and it produces very good results on a wide variety of papers. However, the real issue, IMHO, is not quality of output. It is dye vs. pigment. Dye-based inks produced very vibrant colors and, in my experience, never produce clogs. (I have two canon dye-based printers, one 4 or 5 years old. both occasionally go unused for long periods of time, and neither one has ever needed any cleaning at all--I just turn them on and print.) The downside of dye is that the prints will fade much faster. If you want to sell prints, or want them to last longer than you, you don't want dye. For my uses, i was more concerned with avoiding clogs than archival properties, as I rarely will let a print go more than a few years before replacing it, but if I were selling, I would either use a lab or by a pigment based printer.