I spent some time here
http://www.webbikeworld.com/motorcycle-intercoms/
It seems no one has it quite right yet.
Some reviewers didn't like the expensive ones either.
If I drop 4 or 5 hundred and it isn't ultra perfect in every way for that much dough,
It's going into the swamp.

Guess we'll stick with HNHB - Holler N Holler Back