I'd recommend checking out all the various options.
Verizon, for instance, doesn't yet have the iPhone contract, but there are rumors it's coming. They also have different BlackBerries vs. what Sprint/AT&T carry.
My husband got a Droid at Christas, and he loves it. It's heavy, but it's really functional. The biggest complaint I've heard from iPhone users is that the coverage on the AT&T network isn't as good as Verizon, so they don't always have reception, but they love the phone.
My work provides me with a BB, and it's OK. I'd personally choose a Droid or iPhone if I had the choice, but doing Social Media professionally, I need easier functionality than what I currently have.
I don't know anyone who's had the PalmPre. My husband thought they looked cool, but not enough to break our Verizon contract for a product that struggles in the market.