Ace or Ultegra?
In the past, we commonly recommended against some Dura-Ace 9-speed components in favor of Ultegra 9-speed. No question about it, the “Value Award” went to Ultegra, particularly with regard to crank bearings and headsets. This has changed somewhat. Ultegra 10-speed is still a good value but much of the Dura-Ace 10-speed is a considerable improvement. The brake calipers and crankset are tough to beat.