First, thanks to everyone who responded on my inquiry about "white foam".  I
am a lot wiser as a result.

Now I would like to get opinions about intercom options.  I plan to install
a Garmin 430, a secondary radio, and a CD player among others, and need to
select an intercom system.  The cheapest and simplest option seems to be a
basic intercom, such as the PM 1000.  However I then wonder:

1.  Can you satisfactorily switch between audio inputs, maybe by using
separate switches in the input leads?
2.  What do you do about a marker beacon receiver?
3.  Do the voice switched intercoms work satisfactorily?  I have had very
limited exposure to them, but initially found them intrusive and awkward.  I
am thinking of a basic hot/cold mic switch.  What is your experience?

Otherwise I can spend considerably more and get an audio panel with marker
beacon built in.  Are they worth the extra?

Jerry Fisher