I have an Ipaq hw6515a with Windows Mobile 2003 SE. This unit has GPS capability and has been very useful for navigation using Pocket Streets. This has been a bit cumbersome because I have to run Streets on my desktop to crop a small enough area to copy onto my Ipaq without running out of memory. Another problem has been finding up-to-date information for Streets. Last week I installed Windows Live Search. This is a great solution so long as you can get an Internet connection with your cell providers data plan (or wireless on some Ipaqs). All the information is "live" from the Internet. The map quality is excellent and you can choose between a road map and aerial view. You can search based on any location including current GPS position and then plot a course to get to a hotel, gas station, Starbucks or whatever. I would strongly recommend that you try this before buying a navigation system. It's very well done.