Try the site
www.casioextra.com for your PDA.
I got a PDA for £200 rather than £400, they are supposedly refurbished but they are the latest models and when mine arrived it was all packaged up and to be honest couldnt tell the difference! Not bad for 50% off!
I bought a Garmin eTrak which came complete with the cable required although if you already have the GPS you can find them in most shops. Its then just a case of deciding what software you want to run on it.
I have also played about hooking my GPS upto my laptop. I now have a 14" screen full colour moving map display. Why spend £1200 on a GPS when a £120 one is just as good, even when you include the laptop (which I already had anyway), it still works out cheaper - and of course you can play games, flight pla, etc when you are bored
