I currently have a Treo 650 with sprint and I've decided its time to get a different pda phone and I was hoping someone can point me in the right direction. My requirements list.....

Thanks in advance!


Requirements
-No more buggyness!!!! I've had it with the bugginess of my Treo 650, Im looking for something real good and solid.
-qwerty keyboard
-not huge, treo size, even a little bigger is ok
-voip capable (as a 3rd party app is fine)
-wifi built in

addiional info if it helps....
-I will be adding nav of some sort to it (I'm unaware of any that do nav natively)
-Don't really have a preferenace of palm/wm/etc, however I would like it to be one of the pda standards rather than soemthing proprietary. I generally don't go crazy with lots of apps, but I do some level of additional software. I have about 10 add-on apps to my existing treo 650 and wont use much more than that.
-word/excel documents are a must
-vpn capability is a must, although I would assume all the major pda operating systems must support it
-as far as battery life goes, anything in the 3 day range or so will do
-dont really care about having a camera
-a *GOOD* working bluetooth