Long Reach (47-57mm) brakes for Ultegra 6700
I am about to put in the order for a custom frame, which will be made for 47-57mm brakes. I want to put my Ultegra 6700 groupset on, but obviously I will have to switch the brakes out.
The only long reach brakes I have seen that are made for the new 6700/7900 pull ratio are the Tektro R539. Anyone have experience with this setup? I'm really only going by the price, but that leads me to believe they might not be great.
Are there any other compatible brakes?