I have an x50v myself, I can't even imagine how I would live without it. I have had a few palms, as well as the PDA Smartphones. For the slim design and all the loaded features, this thing is a BEAUTY! I highly recommend you get one, especially at that price!
Well, Sazar would definitely be the person to go to for Dell info... That said, even he couldn't gaurentee they won't release something better at some time in the future
Best that could be done is to say "based on the current road map, I'm not seeing anything on the immediate horizon, nor am I aware of something currently planned". Give it time, and something better will come...
But yeah, knowing "the product I buy today won't be obsolete a week from now" is nice to know Would never count on 6 months, a year, or whatever down the road. And I've known peeps before (not saying this applies to you however) who wouldn't upgrade their 386 because something better "might come out sometime in the future"