Here is a thought... sell me your wife's Rover, and buy the tandem kit for your Rover. Then you can ride together and talk to one another, without you always feeling like you have to wait for her to catch up (or perhaps the other way around if she is the stronger rider) I'm told by the folks at TerraTrike that it only takes 10-15 minutes to change from a single recumbent to the tandem once you've done it a couple of times.
Please call me if you decide to sell one of the Rovers, as I am looking to buy one and eventually end up with a tandem as well. We have several friends who ride bikes frequently, and they all got tired of having someone always having to wait for the slower rider. With the available IPS system, both riders can pedal independent of one another. Heck, you could both take turns not pedaling for that matter.
Mike - area code 517-721-ten, sixteen.