So after reading what seems like HUNDREDS of reviews of both wired and wireless comm systems, and trying several out at dealers and bike shows, I have ordered a Starcom1 Advanced unit with two headset kits from ShangoRider.com. Supposed to be here later this week, so I will put it on the RTSD next week (and take some photos) and report back once I have it all hooked up.
This way, the wife and I can finally make fun of people in traffic without having to yell so loud that they might hear us.