I'm a big fan of Shimano brakes.
105/Ultegra can be had used on ebay for cheap. Look for used Ultegra 5600/6600 for a great value. My fav. brakes evar are Dura Ace 7800
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"Your beauty is an aeroplane;
so high, my heart cannot bear the strain." -A.C. Jobim, Triste