I have an X10, Just upgraded my Fiancés phone and she chose the Arc. She has taken great delight in pointing out all the improvements it has over the X10, much to my disgust lol. Although it works as a slight preview of what is hopefully to come with the X10's GB update. I had my doubts as to how much better it would be in comparison, but my god is it a lovely piece of kit. I know it's early days, but has anything been released as to the expected scope of updates for the Arc?