Quick Take: The HP iPaq H4155 is an ideal office companion with its wireless (Wi-Fi and Bluetooth) connectivity and a robust software package. Plus, you get 64MB of memory, a fast 400MHz processor, and multimedia capabilities. The small form factor and user-replaceable battery also make it perfect for road warriors. Just be prepared to pay a hefty price: $450, to be exact. The HP iPaq H4150 and H4155 are the same models, except the latter is sold only through retail outlets. For a more in-depth look at the H4155, please refer to CNET's review of the.