I have a Nokia E62 (blackberry compatible) which is pretty sweet, I use it for voice and data, note keeping, projects, etc....using it like that most of the day I get two full days with bluetooth on the entire time.
There are a lot of non-RIM brand blackberry compatible phones available, I would shop those as the actual RIM products aren't the greatest.
My company is a beta site for Motorola and RIM so we always have the latest around....sorry to say the latest is not always the greatest.
The pearl is nice for size and style but if you're not even using it as a cellular phone then I would get something with a full keyboard, they are much easier and faster to type on.
Another option would be to a get a wifi-enabled PDA/Organizer, if you're big on size and style Sony has some nice offerings.