It took some time for my Trex to get it flying (About one and a half months) and now it is just so fun that I do not regret on any component of my choice:
SA version with stock motor and ESC
Futaba 401 Gyro and digital 9650 servo.
Hitec miniservos HS65 with karbonite gear (3 of them)
Align 3c 2100 mAh Battery