Your best bet for painless receipt of weather information and efficient transfer of emails with the M802/AT140 equipment
would be to add a Pactor modem
. The new Pactor 4 modems are definitely the way to go.
The smaller SCS model DR-7400 with appropriate cables
to connect to your laptop
and to the M802 is all you need. It can be had for under $1,500 new these days from several sources, plus the cost of the connecting cables
The WX info and, especially, the WX faxes received via email are much easier, much faster, and much clearer than trying to capture them direct from over-the-air broadcasts.
For serious cruising, IMHO this package is much to be preferred over other alternatives.