I'm a big Blackberry fan, which does all of what you need, but you don't want the phone option. I also own an iPod touch, and am not sure I would use it as a PDA. Though, for what you need it for, it seems like it could be an option. I carried Palms for a couple of years, and had great luck with them. My recommendation for a non-phone PDA would be a Palm T|X.