Hello All, I am now shopping to replace my creaky old Cannon. I have done a great deal of research on frame options, and am more or settled on a Steelman frame (Reynolds 853/Dedacciai 14.5/foco blend). But, I am not yet setteld on the question of components. I am a serious recreational rider. I like to do century rides, and other middle distance events - no racing. Apart from the weight difference, I am am curious to hear your perspectives on whether or not the price differential between Ultegra and Dura Ace is justifiable? Becasue I don't race, I am not overly concerned about the weight difference. But, am I missing something by settling for the Ultegra rather than the Dura Ace? Thanks.