Which v-brakes with Campy ergolevers?

[robertbb]

As the title says: which v-brakes will work with Campy ergolevers? (Potenza levers in this case, but I'm sure all Campy levers pull the same amount of cable).

v-brakes appear to come in different arm lengths - what do I need to be aware of here when matching it to the levers? Is there anything else I need to know?