I too have the CAT brakes, and I have the Delta Aztec Ti pads. DONT WASTE YOU MONEY ON THOSE PADS. Braking power is seriously diminished, partially due to the pad compound, and partially due to the small surface area of the pad.
But back to the subject, CAT brakes are pretty damned good, like Gila said, power as good as, if not better than 2003 DA. The only downside is instalation. They are a royal pain to set up, and the tension spring is always popping out. I had to dissasemble the whole thing and bend the springs to keep them from popping out.
Plus the centering of them is super hard, better instructions needed. If you make them too tight the brake arms have difficulity moving, so you need to get them just right. But, once there set up they are a charm.