You said you can wait. I suggest waiting for the model 7290 quad-band. It looks like a slightly shorter version of the 7780 (2/3rd height screen), but has quad band and BlueTooth.
Here's one of my favourites: Why BlackBerry [click]?
A good thread that covers some of the real reasons many people prefer to use a BlackBerry over multimedia handhelds running PalmOS/PocketPC such as Treo/iPaq handhelds.