Back to my initial question - what budget are you working with. In deciding on radio gear for any heli, my first criteria is DEPENDABILITY/RELIABILITY. For sport flying, a slower and lower torque servo, on a heli of that size, will never cause it to crash, but a servo with higher specs from a less proven manufacturer may not be as dependable/reliable and such a servo, that stops working properly will cause a crash, it does not mater how good a pilot is, That is why I like the Futaba servos I mentioned. If you are ight for budget and just sport flying then you can go all with the Futaba S-148's.