I would get a Blackberry Curve, or the new Bold instead of a Pearl. Bigger screen, much better keyboard - it's worth the extra cost. My father-in-law has the Pearl and has a hard time entering text.
I've got the 8830 and love it. The GPS is very basic, but works very well. But AFAIK, there are no audble directions on the Blackberry GPS.
2009 BMW 128i ~ Jet Black ~ Sport Package ~ Sunroof ~ USB Integration ~ Delivered on October 14, 2009