when I was commuting year round I considered one bike my "year round commuter and another my "joy ride" bike which I would use for commuting during fair weather months. commuting lays an aweful beating on a bike and if do it year round you may want racks fenders etc. it's always nice to have a "nice" bike to play with on the weekends. also the nice bike can be a back-up commuter. nothing wrong with what you're doing. see how it goes through the fall. after a couple months, you may find yourself wanting to keep this sweet ride from the abuses of commuting