I forgot about that rebate program. In my mind, that's a BIG plus for the 858 or 958, even if it were just for the RAM mount!

I've used the weathersense and the XM weather receiver. The weathersense gives you a snapshot of what's happening in your location, right now (barometer and how it's changing). The XM helps you figure out what's going to happen an hour from now....where is that storm relative to my lake? When is the wind going to pick up or shift?

The weathersense data can be shared by interlink; XM weather data cannot.