Stephen,

Wow! Good luck on the hearing part of your medicals for the next years
;-)

Seriously, flying without a headset in an aircraft that noisy is
dangerous to your health. There's little to debate about this.

Obviously, before you buy an intercom, you'll need a headset. Spring
for an active unit, no matter what. You own an airplane, so you'll
likely fly a considerable amount of hours.

Any thoughts, experiences would be appreciated.

The PC4 seems to be an old unit not in production anymore. I'd get
something current. You can't go wrong with PS Engineering, but they
aren't exactly low budget. For that, the Flightcom 403mc is hard to
beat. For a portable, the cheapo unit from Pilot Avionics, PA-400, is
probably it, but you might invite trouble.

--
Thomas Borchert (EDDH)