ST_Jim
In the Hotel California...
Sena also has a new "20S Evo" almost available. $299 pre-order at Revzilla (same as 20S list price?).
https://www.sena.com/product/20s-evo/
"The 20S EVO is the next generation of the original 20S, with an updated design and improved intercom functionality and stability to keep up with your ride. The 20S EVO was designed with a fixed type, shark fin antenna as opposed to its predecessor with the flip up antenna. This sleek new antenna design improves upon intercom stability and even secures the intercom distance while updates to the hardware allow for an even more robust general performance updates." (I've heard of people breaking the flip up antenna, so this may be a good choice.)
The 30K adds "adaptive mesh networking" which is supposed to make connections more seamless when a riding buddy goes out of range. https://www.sena.com/product/30k/ It has a flip up antenna to break.
I've no idea whether the newer models will handle talking to older Sena models, let alone competitor units.
https://www.sena.com/product/20s-evo/
"The 20S EVO is the next generation of the original 20S, with an updated design and improved intercom functionality and stability to keep up with your ride. The 20S EVO was designed with a fixed type, shark fin antenna as opposed to its predecessor with the flip up antenna. This sleek new antenna design improves upon intercom stability and even secures the intercom distance while updates to the hardware allow for an even more robust general performance updates." (I've heard of people breaking the flip up antenna, so this may be a good choice.)
The 30K adds "adaptive mesh networking" which is supposed to make connections more seamless when a riding buddy goes out of range. https://www.sena.com/product/30k/ It has a flip up antenna to break.
I've no idea whether the newer models will handle talking to older Sena models, let alone competitor units.