Hi
After having lost my 3 year old Dell PDA with TomTom a couple of months back, I was in the same predicament as yourself. Spent weeks researching (and just could not get on with a paper based organiser) and plumped for a HP ipaq travelmate rx5935.
This has a host of features, WLAN, bluetooth and also has TomTom GPS built in to the system, which has not let me done to date as well as the normal PDA functions. Just switch the TomTom software on the PDA on, let it find the GPS signal and off you go - no fuss. I went direct to HP store which was retailing at £295, registered for their newsletter and got £40 knocked off the price

. Worth checking if this is still round.
HTH.