Was wondering if anyone has any comments on RIM blackberry, Good Link and Visto products (and other stuff) versus Sprint Business Connection and Cingular XM. I'm on Sprint BC and like it so far, but is interested to know what experience others have. Like your Sprint BCs? Think it sucks? Like the Blackberry? etc

Particularly, what are the functionalities and features that are better than my Sprint BC? Who is reputed to give good support, and all that stuff.

Thanks! Happy Weekend!