I currently use an IBM branded Palm V with 2MB of memory. I use a very simple implementation of GTD using the built-in Palm apps (synced with Microsoft Outlook) much as DA describes in one of his "tips" articles on using the Palm. I have more than sufficient memory for this purpose.
I am lured by the seduction of newer Palm and Sony devices with high resolution screens and more memory/features but I'm afraid of the possible distraction (and time-wasting) of playing around and tweaking with my Palm instead of using it efficiently and effectively for GTD.
Has anyone here found a PDA hardware upgrade to actually be counter-productive?