Thanks chaps.
Some useful points and something to think about.
I think waiting for a few months is a good idea especially since I cant really afford to spend the £600 just yet for the pda and all the extra bits and bobs i want (tom tom GPS, car mount, CF/SD cards, etc).
I'm not sure if WM2005 is important to me since I know nothing about it, but I do like to have the latest version of something if i'm spending a few 100 quid.
I do like the look of the current HX4700 though. The new models might be different and also a lot more expensive!
Also waiting a few months is frustrating when you want to play with a new toy

Hmm now i wish you hadn't told me that new versions are around the corner!
Rob3103, I have had a PDA before but it was a palm V (or something like that) so it probably doesn't count.
Lorax