This looks like a nice first road tandem, as long as it fits the both of you. Look to see if the left side of your rear hub is threaded externally for a drum brake. If it is, the Arai drag brake is the best at what you are looking for. It is no longer being made and might take some patience to locate. You can try the usual places, such as Tandems Ltd, Tandems East, or ebay. It will also need a bar-end shifter, or some other means of activating it. There is much to find about it on the BBS archive. If you are going to do any serious climbing, you probably would be happier with a 12-32 or 12-34 cassette. This will require a mountain bike derrailleur such as a Deorre or LX, as well as a longer chain. If you go with 34 teeth, make sure you go to a "mega" derr. Either one will work perfectly with your shifter. I would also say that staying with the triple crank is the way to go.
There are several adjustable length stoker stems available, such as control tech. I found a really nice adjustable angle stem made by Oval tech. It is designed to be a conventional steering stem, but can easily be adopted to a seatpost with a readily available shim.
Last edited by steve53mg; 06-23-11 at 10:03 AM.