I've been inking with a brush for quite awhile now.  It's tough but, man is it worth it.  Anyways, a couple of weeks ago I drawing well after midnight and knocked the brush, bristle down onto the floor.  It happened in slow mo and I was devastated.  I picked it up and right near the ferrel I could see bent bristles.  gasp ...   I bought other brushes, even a sable hair brush but they just were not as good.  It took almost two weeks to get a replacement.  Over those weeks I watched the BBC documentary on Daniel Clowes and Robert Crumb and Clowes starts talking about how he found this perfect brush which isn't even an inking brush; it's a watercolor brush!  That brush which is a Cottman is the same brush I use.  It's kismet.  Today, I uploaded Huey, the I.T. Guy, who is inked with this brush.  After I scanned it and started coloring it, I noticed how crisp the lines were.  If you want to challenge yourself with the brush, get it this brush, the Cottman, you won't be sorry.