Garmin Oregon vs. Montana

[Flying Forester]

Thinking about upgrading my GPS. Currently have a 64stc, it works great, but having to carry extra batteries is annoying. I am trying to configure so every peripheral in my pack can be charged, preferably via the same type of connection.

I am firmly in the Garmin camp, for a lot of reasons, but I need help with experiences with the Oregon and Montana series. Is it true that the Montana, while larger does not offer bluetooth?

Any input, observations or other comments are welcome.

Markus