What do you mean by the kobo screen being inaccurate? Is this for the stylus of the touch itself? I was considering buying a kobo but this comment scares me a bit now.
I've been using an Elipsa for about a year with a Renaisser stylus - have not noticed any inaccuracy but the writing can sometimes be laggy. I really like it, all in all though - all of my work notes tend to be on it.