Sounds good
iPhone is cool and is very good, but to use 100% of its potential you have to unlock the phone. I have a friend with the iPhone...bought in 5th Avenue, NY. He unlocked the firmware to work with Vodafone & TIM Italy, and now it's a really good phone, but I'm not sure that you can update it with new firmware release on an unlocked phone. But my friend is really noob about electronics devices, so I'm not sure of this
btw, if you need a really complete cellphone/PDA, you can look HTC
HTC Touch Cruise and Tytn II are really good. In Italy there are many traders that use HTC PDAs. And if you live in the USA, you are very lucky: usually new technologies are cheaper than in Italy
BB