But there could be a problem with scanning in B&W as I draw with a handwriting pen, and I found B&W scans were unsatisfactory.
Dude, you mean a ballpoint? You have GOT to try using felt tip pens. The drawings I have done in ballpoint do not get read well at all by scanners -- that's 'xuz ballpoints suck and felt tip rules.
I recommend Pigma Micron from Sakura.
If my balls feel like watermelons -- then what do watermelons feel like to a watermelon plant? Ay ay ay!