Probably any Blackberry, iPhone, or Windows Mobile device should have excellent intergration with your computer.
I've personally found the iPhone to be the easiest out of all the three. My iPhone and Macbook can sync videos, music, calender events, contacts, and pictures under one button.
If you're looking for a business oriented choice, the obvious choice would be the Blackberry. Exellent intergration with business programs.
Originally Posted by Äß§ý∩†H♠HäŽ€
Agreed that's what I've got although it he would need to install windows mobile OS on his computer.
You can't install Windows Mobile onto a computer.
You can install ActiveSync or Windows Mobile Device Center to sync data with a Windows Mobile enabled phone.