Not a pro but I built a folding Tarot Ironman 650, 4830-420 Multistar with 45amp Multistar ESC's,
flying 1455 APC props on a Naza V1 and 4S 8000 30C battery. DX8 Spektrum
With Feiyu Tech 2 axis gimbal and a GoPro 3+ black,
Extremely stable, highly visible for LOS and flight times over 25 min...