What's line pathing?
Speaking of drawing devices, my sister has an iPad and a (not pressure sensitive) stylus. I got to play with it for a bit and you can zoom in on the image to draw little details. The iPad's screen is smaller than an 8.5 by 11 inch sheet of paper, though, so it's confining. However, she doesn't use it primarily for drawing. I'm guessing that something made by Wacom would be a better choice for drawing, since that's what they're designed for.