GPS baud rate setting

Hi all,

I have a GPS puck that acquires/computes a GPS fix every second (1Hz). This GPS then transmits this data to a Vario (V7) and then PDA.

The default baud rate of the GPS is 4800 baud but I have the ability to increase it to 9600 or 19200 bauds. Is there a benefit of a higher transmission baud rate for the GPS? Does a 4800 baud rate allow the full transmission of a GPS NMEA 0183 sentence every second? I am not sure how much data is contained in a NMEA 0183 sentence, and if it can "all go through" every seconds at 4800 bauds. (Note: The vario and PNA can receive a 19200 bauds). What are the drawbacks of a baud rate set too high? Transmission errors?

Given the GPS limitation (1Hz fix) I understand that, best case, my vario (V7) and PDA cannot get a fix more frequent than one per second. I want to set the baud rate high enough where the GPS 1Hz fix is the limiting factor, not the speed of communication between the GPS and the Vario/PDA.
Thanks all for your inputs.
B.