In the beginning I carried around a v710 and a 7520, but now I am down to the 7100i. Mainly due to having less to carry around, also I suggest if you do use 2 devices look into a razr as a phone. Reason why is how slim it is, and that is charges thru USB like the Blackberry does.
[rubbing his thumb and forefinger together]
Mr. Pink: Do you know what this is? Its the world's smallest violin playing just for the waitresses.