The best method to operate has been with a K3 and RRC (RemoteRig). The RHR team has eliminated the need for the interface box using software.
Plug your K3/mini directly to your PC and operate some of the best station in the USA and abroad w/o the headaches of configuring an RRC interface box. This video explains the step by step instructions on how to get a K3/mini setup and running. It's really easy! Learn more here: http://www.RemoteHamRadio.com
Source: QRZ News
Link: Operating Remote! Game Changer!