Question yourself real good before you buy it.
Also take into account battery life, size, accessories
and what features you NEED, and what could just be good to have.
What do you want to use it for.
Phonebook, Calender, taking notes, a few small games maybe.
Go with Palm. Usually a lot cheaper too.
Do you need to watch movies, moving some data, and other things with a gee-viz factor, go with iPaq,s or the like. But then look at what it costs.
I use a laptop for the heavy stuff, but normally does everything else with my old trusty palm 3x, 4mb.
But as always, requirements is different and YMMW.