I bought this bike for leisurely exploring the back-roads, which happen to be steep in this area. I am finding that the Jamis Nova's race-oriented gearing is not great for hill climbing. Has anyone changed the cassette or chainrings on their Nova, and can recommend a new setup that works better for hills? I don't want to change the derailleurs, but I may change the front if necessary. The stock setup is Shimano Tiagra FD 52-42-30 w/ Shimano 105 RD 12-25. I find myself wishing for my mountain bike's 42-32-22 crankset sometimes.