I have a King Kong III Pro 200a ESC in the pile for the 766, i have not run it yet but all I've heard from users has been positive. Before I made the purchase I contacted the guy at MD to talk about it and next thing I know it was an hour later, super nice guy and pretty knowledgeable. There are 4 total versions, a pro version and not a pro version, in a 160a or 200a model. You definitely want the pro version as the other non-pro version has been discontinued and from what the guy told me is the fan ended up not doing anything other than swirling hot air inside the case. They don't have a BEC but that wasn't a make it or break it scenario for me, I've run the Castle BEC Pro for years with no issues. The King Kong has a GUI much like the Castle, it has a governor and it does logging as well, all the things I liked about the Castle(except the gov). It also has Active Freewheeling!
It is about the same physical size as a Castle 160. The price of the 160 is $287 which is a whole lot more acceptable than a Kosmik and the 200a is a whole $27 more.
Features:
32-bit Microprocessor with up to 80MHz frequency
4-14S Lipo support
Active FreeWheeling
Motor PWM frequency 8-32K Hz
Throttle resolution up to 1uS
Throttle signal refresh rate up to 1K Hz
Integrated RPM sensor to simplize the wiring for extenal Governor
Optimized the Governor Algorithm to ensure the head speed more stable
Fully CNC aluminium housing with built-in high quality bearing cooling fan to efficient the heat dissipation
Built-In data Logger (logging parameters: battery voltage/current/throttle output/temperature/motor RPM)
Reserve the telemetry interface easy to transfer the realtime data to the third part device
Program setting by your smartphone through an external wifi module (sold separately)
Real flight data (battery voltage, current, esc temperature,motor rpm ) can be telemetered on your smartphone
Max 240000 RPM with 2 pole motor (Heli Mode: Max 160000 electric RPM)
Available in 160A and 200A (4-14S lipo)
KingKong III Pro 160A HV Features:
Input Voltage: 4s-14s Lipo
Continuous Current: 160A
Max Current: 220A
BEC: No (OPTO Isolated)
Programmability: HiFei USB Link (included), Hifei Software V5.0 (Included), Wifi module (sold separately)
Data Logging: Yes
Dimensions: 100mm x 57mm x 23mm (3.93" x 2.24" x 0.90")
Weight: 196g (6.91oz)
http://www.mdhelicoptersusa.com/index.php?route=product/product&path=80_81&product_id=400FYI: I am not in anyway associated with this company(MD or Hefei), I am just excited that there is another option for a 200a 14s esc without taking out a second mortgage.