Good and bad things about both choices.
With an internal, you have an all-in-one type of unit in which you don't have to carry around an additional piece. If you think you'll need the GPS "out of the car" while walking around, perhaps the internal is the way to go.
The nice thing about the BT options is the ability to use it with other devices - your laptop, your BB, etc. - and a lot of them are small enough that they fit in your shirt pocket.
The Curve has a camera, so with a BT receiver you've got "the whole Monty".
I have an 8830 from Verizon and have found the BT receiver a great way to go - I can use it with the BB and also my laptop, and my older PPC.
Hope this helps.
tomtheguitarguy
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