It's hard to go wrong with the Gatorskins, but the Panaracer Pasela Tourguard (or the Tourguard T-serv) is also a good tire. I use both... Gatorskins on my tandem, tourguards on my LHT. The Gatorskins seem slightly more flat resistant, while the tourguards have a nicer ride and better wet traction. Plus, they are cheaper.