The problem with most ink pens and gloss prints is that the ink does not "dry" and adhere to the paper surface. I haven't tried Micron pens yet, but I have tested, experimentally, the Uniball 207 pen -- the sort used to write checks and touted to be proof against check-washing.
I'm sure it is not archival but after drying for 24 hours the 207's ink does not smudge. It is significantly darker than a pencil, though (and I also prefer the look of the latter).
Paul