I am looking at getting one of these three, X-01, X-02 or the classic portable because it is the same price basically as the X-02. This will depend on what you guys with experience have to say. What makes the X-02 better than the X-01? Is the classic portable better than the X-02. I am looking for the one that will in the end be the easiest to use. Thanks in advance for your help and suggestions.