75th anniversary special and limited editions (in the 149 series) have the advantage that they are big with a big nib -- the 149 nib. The Hemingway probably has high value among the 149's because it was the first. I don't especially like Hemingway the author, but I would like to have the pen.
I like the Dickens; others think it is grotesquely top heavy. The Proust looks like a great pen, and the Verne just plain looks great. I want an F. Scott Fitzgerald, but, if other pens take priority and it is a long time coming, I won't worry about it.