What phone for my application?

Hello 1st post here...So I owned my Treo 650 for over 3 years now. I'm getting some great deals on a new phone from AT&T. But I'm torn as to which phone I should get next. It is either the Blackberry Curve 8310, Tilt or iPhone. I find myself not using my Treo because:

1. My plan is shared with 6 phones at 850 anytime minutes.
2. Voice quality isn't that great. Speakerphone and regular calls are to low.
3. Bluetooth is all static (this is my 2nd Treo 650, same problem).
4. Poor battery charge.
5. Bulky.

But I do however like the ability with the QWERTY keyboard for texting and e-mailing, touchscreen, multiple 3rd party software, music player, memory card expandability.

I would like a phone with a QWERTY keyboard, e-mail (for work and gmail), touchscreen, good phone call quality, Bluetooth w/o static, good phone charge. Any suggestions will be appreciated.

i would get the iphone 3g,
i am getting the iphone 3g hopefully in less than a weak

those other phones are nice but the iphone is a "phone/ipod touch/safari web browser" not to mention all the apps that are coming out 4 it