The E-125 is clearly the one I'd pick if I were buying a Casio PDA for my own use.

CNN: Review: Design makes the difference for pocket-PC gadgets

Sure, anyone can build a low-cost monochrome PDA, but what about one that a busy technophobe mom could use.

ENGADGET: Switched On -- PDAs, a multiple murder mystery

INSPI2 augments a Web site and client application that is still in use on laptops and PDA-type Windows Mobile devices.

FORBES: SAPVoice: BYOD + Field Service App = Major ROI for Mortgage Services Firm