[BrianG]

Both the Turnigy and CC HV ESCs are air ESCs as others have said. No, their brakes are not set up for car use, but you wouldn't want electric brakes on a HV setup anyway IMO. Why not use a servo for the brakes?

Both are usable with a pistol grip radio.

Something else to consider; air ESCs generally don't have as high of a surge current rating as a car ESC, so pick the right motor wind and gear accordingly to keep current down. Shouldn't need high currents with high voltage though...