Al, I have used chatterboxes and they are good for a track day, where you can stuff the headset under your helmet. However, they are of cheap quality and don't offer the noise protection of a "real" intercom, like the aircraft one posted above.
In my seven I have a Starcom intercom. I know a lot of the UK folks use the Autocom brand, but choose the Starcom because it had more features. For headsets, I have used both the aircraft "clamp over the head" type and "in ear" version ( example ). I find that the in-ear version is much more comfortable to use for a long drive, although it takes longer to put on. The "clamp on" headsets tend to squeeze your head - which can give you a headache - but they do keep your ears warm!
I am thinking seriously about getting in on the bulk buy mentioned earlier. It sounds like the best of both worlds, but unfortunately is not cheap!