Right now, I'm tentatively considering:
Sony CLIE PEG-S320
This one is slick, with the only major drawback being it's use of Memory Sticks. CompactFlash would be preferable, since I've got two CF cards already. Uses the new Palm OS 4.0.
This one is also pretty slick. It has no major faults that I know of, although it uses a slightly customized version of Palm OS, 3.5.2H, as opposed to the new 4.0. Available Springboard module ($40) would allow me to utilize my CompactFlash cards with it.
The classic, the old stand-by, the one that gets chosen if none of the other can prove better. The biggest drawback here is the slow CPU, the slowest one in consderation. Uses Palm OS 3.5. No Expansion.
The only Pocket PC in the group, making use of Win CE. Performance is questionable, and battery life sucks compared to the others. Screen resolution is much better than Palm devices.
The first three are the ones I'm more seriously considering, mostly 'cause I've heard WinCE runs like a dog with 16 MB of RAM, which is what the (B&W) iPAQ has. I also noticed that Handspring has just released two new models, the Visor Pro and the Visor Neo. Depending on what kind of prices they're available for, I may look into them, too.
I'm not willing to spend more than $200 on this thing, which basically means I'm not seriously considering a color PDA.
If anyone has any suggestions, opinions, experience, whatever, I'd love to hear it. If you have a handheld computer, let me know what you like or dislike about it, whether you're pleased with it, what you'd change about it, whether you'd buy it again, etc.