It really depends. The treo has a touchscreen, blackjack doesn't. I don't know firsthand but I've heard that the 680's menus and organization are more intuitive. It is up to you. I would play with a 680 and see if you prefer that over the blackjack. Read some reviews on both and see which one suits you the best. I am thinking about getting a 680, but not totally sure. Hope this helps. good luck.
