Thinking about a 2 way communication set

[DucNrun]

My wife has been bugging me for years to get a 2 way communication set for our bikes and I've always resisted.  But our last few rides have had me thinking that it might be nice to have, particularly as we discuss last-minute changes to the planned route due to traffic, etc.  Anybody here use a 2 way?  What do you use?  Do you like it?  Any other thoughts on it? 

We both ride S4RS monsters with aftermarket exhausts--mine with an unbaffled Arrow full system and hers with a Termi half-system.  Will we even be able to hear anything if we got a 2 way system? I'm curious to hear what you all think...