My wife has a LHT and as we tour on our Co-motion Mocha copilot tandem, the LHT just gets used for commuting. The frame and fork are incredibly heavy and although I'm sure it is well built it's just not in the same class as Co-motion construction. I think the LHT is made from drainpipe whereas the Co-motion is built from high quality steel. There's no doubt that the LHT makes a good touring bike but given the choice the Co-motion is the better buy.
Parts and wheels can always be upgraded but the frame is the heart and soul of the bike.