Good advice there - many of us fly with Mega 16/15/3 13T on 3S TP2100, CC35 (not CC25 - won't handle 4 servos), 3xHS56, 1xHS50 (tail), Futaba GY401 (great Gyro if you've got at least a 6ch TX). Good combo. There are other motor, battery and ESC options, but this combo is the most prevalent. Also, don't buy a cheap RX - this is an expensive heli - Berg 6, Sombra Shadow 3, FMA or maybe that Futaba model that Hover259 mentionned.