I swapped out my triple for a Sugino low-wide double crankset for touring about 5 years ago. I upgraded my rear DR to a long-cage version, and everything worked beautifully without modifying any other existing components. At the cost of some high gears I rarely used (especially for a loaded bike), I greatly increased my gear range and gained some really low gears for hill climbing. As a bonus, I no longer worry about cross-chain shifting and I now have a chainring guard on my crankset, which is very nice for commuting.