Bicycle Mechanics - 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?

Many people with the newer levers have not had a problem using 'old' calipers. I would use these:

http://www.cambriabike.com/shopexd.asp?Item=100029878. I have a set of the older r600 calipers and they work well. I have used Tektros and had no problems, but I've only had short reach.

Yeah, I was planning to use the Shimano 650 until I read some reports of poor performance with 6700. But it sounds like that can be resolved with some set-up trickery if it is even apparent at all. Also, there is this bike (6700 w/650), and I don't expect a build of this quality to settle on poor braking performance: http://www.signalcycles.com/bikes-Ryan.php

http://www.signalcycles.com/images/bikes/Ryan01.jpg

I can confirm that using old-style brakes with Shimano's newer brake levers does work OK. The most important thing is to set-up the bite point, when the brakes first contact the rim, to be after the levers have pulled quite a bit - maybe around half of their travel. When the lever is not in use, that means that the pads will be quite a bit farther away from the rim than you might be used to. So that you don't need to pull the lever too much before the brakes engage, you can use the supplied rubber shims to make the levers resting position a little closer to the bars. This setup has worked pretty well for me.

Apparently the newer brifters (5700, 6700) pull more cable than their predecessors so they will allow older calipers to have more pad clearance but will require a bit more hand pressure to obtain the same braking response. A bit like using V-brake levers on caliper or cantilever brakes but not as extreme.

Actually, I can just put back the tekro short reach brakes on my current bike (where my 6700 is currently) and see how it works. That should provide the same results.

I've been using these levers for a while now on my Gunnar Sport with Shimano R650's and they've been fine. I really don't notice much difference between these and my old 6603 levers. Maybe if I compared them side-by-side I might be able to tell, but It's nothing you can't get used to.