If you get brakes with too long a reach, you could always replace the wheels with smaller ones. For example, lets say you currently have ISO622 wheels, and the brake pads end up having a travel range of 12 to 26mm (center of travel is 19mm down) below your current braking surface; you could build up a set of ISO5990 (aka 650a), ISO584 (aka 650b) or even ISO571 (aka 650c) wheels. That way you could use the brakes you acquired on your bike, with the simple change of the wheels.