Be very specific about what kind of riding you intend to do, what the bulk of your riding terrain consists of, what you want it to do for you (i.e. - - "help me keep control but not be too complicated," "have a lock-out feature," etc.), your weight (if it's unusual one way or the other) and how much you intend to spend on such an upgrade. These are all questions that will have to be pried out of you post-by-post if you do not lay it out in your thread.