Tektro's R730 (BR7308) Long Reach Road Calipers (47-57mm) work great on my track bike framed build. However, I (of course) have the pads set nearly as high in the arms as they'll go (which is no big surprise with the 700c wheels).
These brake calipers offer strong, yet predictable, stopping power and are very well made imo. I'm a huge fan of the Avid BB5 F disk on my wifes hybridized mtb bike, but these Tektros are really very good for the price imo.