Good PDA Phone, any suggestions?

[n2knee]

Hi guys!
i'm planning to buy my lovely wifey a PDA phone for her upcoming birthday.
the problem is i'm a person who's knows nothing about gadgets.
PDA, MP3/MP4, PSP....i just hear of them but i only have a 3-year old cellphone, that's all i know.
so now i'm looking at different PDA phone models/brand. saw the likes of O2, Dopod, Palm, HP and others.
what brand and model would you guys suggest, and why?
BTW, i'll buy the unit in HK coz its cheaper, would it be compatible with our local system in phil?

ang alam ko lang na pda phone ay yung gawa ng HP. ang pda phone at smart phone pareho ba? gusto mo ba ng touch screen?

smart phones:
treo 6xx, 7xxx
motorolla q
nokia e62

lahat ng ito ay either tri-band or quadband. gagana yan sa pilipinas.