Are you looking for PocketPC or a PalmOS PDA? I have the Palm Tungsten E, Sony Clie SJ33, and a Compaq iPAQ. The first two are Palm based, while the iPAQ is a PocketPC. I personally find the Palms easier to use and absolutely love the new PalmOS 5 stuff.
If you are not planning on doing anything hardcore with your PDA, I'd recommend anything from Palm otherwise get a PocketPC.