The triple-antenna Tour is operated by a single button. In search mode, DSP (which stands for Digital Signal Processor) separates the signals of multiple buried beacons. In transmit mode, it automatically detects other transmitters and syncopates its signal to avoid overlaps in multiple-burial scenarios. This spring, Pieps is releasing the Vector ($599), the first four-antenna, GPS-supported unit on the market. [$350; pieps.com]