Motorola Q

I know there might be other threads floating around like this, but I have a particular situation. I'm a student, and was looking for a PDA/phone, or something like it. I don't know much about BlackBerry and how it differs from other PDAs. I mainly want to use whatever I get for school planning, calender use, and things that a basic PDA will offer. I won't even be getting a data package for online/email use, and I'm going to buy either one as a retail package (probably on eBay). That being said, which is a better choice?

P.S. I've looked into normal PDAs, without the phone tied into it, and I've realized that it'd be best for me to just get a PDA/phone.

Any advice is appreciated, thanks.