I've got a 4 place system from Revolution. It is integrated with the stereo, marine radio, and I also have a feature that is connected to low oil pressure or high water temp. for ea. motor that will emit a different tone for ea. motor if either of these conditions occur.
I went with the throat mikes and after getting used to them I wouldn't do without them.
Todd and Gary are great to work with and I highly recommend them/Revolution Marine.