I am an experienced computer and Web user. I'm very comfortable working in those areas. I've always used stacks of Post-Its to make notes of projects, tasks, appointments, and meetings, but now I need a better method.

I'd like a nice middle-of-the-road PDA. Something sturdy and useful that will help me hit the ground running, is modestly upgradeable, but isn't too fancy. Something with a good screen that's sharp -- not described as small or difficult to read.

I'd like the PDA to be reasonably upgradeable or expandable in memory, so that it could grow with my needs and wants for a little while. I'd like to be able to download extra applications should I need to.

I don't think I need a color screen. I don't need something that's also a cell phone, or GPS, or digital camera. I don't need extra bells and whistles. I want something that looks and feels solidly professional and feels good in my hand. I don't want something that makes me look like I could be playing
games. I'd like to be able to synchronize it with my email. A wired connection would be fine. I don't need wireless just yet. A cradle would be good.

I've been looking for work for some time, so I'd like to spend between $100-$200, with $150 being a good target.

Any suggestions?