I need a new phone

So I need to get a new phone. Not in a great rush, but a new phone is still required. I am however paralysed with choice!

I have used a blackberry Curve for a while now as my corporate phone, and it has been a great phone. Its solid, and apart for a few "random" re-boots it has served me well.

But now I have a choice of what phone I may like to use and I find this confusing, so any ideas would be helpful!

I am currently thinking about either -

• Blackberry (curve again I think)
• iPhone (of course)
• HTC Dream

I like being able to access the net while I am out, however Email and Calendar are the real "must have" apps. I really like the tactile keyboard on the Blackberry and the HTC, but I hear the battery life on the HTC (and iPhone) is not fantastic.

Twittering is also a requirement!

I might actually like to make calls on the phone from time to time also!

Any thoughts? Any pros and Cons I should look out for? And given I will be paying for this myself, any ideas on who has the best mobile plans in Australia?!?!