If you dont care about 3G and prefer the better camera, get the 8900.
There no other reason to get the bold unless you prefer the way it feels in your hand and how you can type on the keyboard.
i.e. small hands prefer the smaller 8900, but big hands may have trouble typing on the 8900 keypad.
"That's it then. Cancel the kitchen scraps for lepers and orphans, no more merciful beheadings... and call off Christmas."