R100GS Jesse Bags
BMW's hard luggage are just about the best factory cases available, but Jesse bags are almost legendary. These things are waterproof, rugged, and cleanly designed, and with the addition of the Odyessey line, they even fit the standard BMW luggage mounts. In fact, the Odyessey bags are available to fit /5, /6, /7, R100, and early K style mounts. They offer 100 liters of capacity where the BMW cases have only 57, and are only 10 liters shy of the standard Jesse bags. They're 34" across when mounted on the bike, while the BMW cases measure 33 1/2".