Well it depends on what you are looking for. The one problem I see with the Dell Axim is the bulky size. Between the Palm OS and Pocket PC...my preference is the Pocket PC.
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If you are looking for size, my recomendations:


299.99 each

HP iPaq 1945 (weighs 4.4 ounces) SD expansion only
Toshiba E405 (weighs 5.1 ounces) and SD expansion only


Im not sure about Toshiba, but HP does make a little case that the PDA will fit in so you can add CF I & II support. It makes it about the size of the 2215, but the case is like 40 bucks
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If you want Compact Flash & Secure Digital Expansion capabilities built in already

399.99 each

HP iPaq 2215 is a decent one (weighs 5.1 ounces, but a little bulkier then the 1945)

The Toshiba e755 has 802.11b built in and weighs 6.9 ounces...