I did some research for the GT3C and RC4G and the big difference is the gyro and 4 channel. For the other option they seem to be in the same league. Anyway i really like the GT3C so i will go with it.

Now I need to find another servo since the one i order in bangood is ''out of stock''.

I have two choice:

1. TrackStar TS-P12S Servo:
http://www.hobbyking.com/hobbyking/store/__58282__TrackStar_TS_P12S_High_Speed_Digital_1_12_Scale_Pan_Car_Steering_Servo_28g_3_6kg_0_05sec.html

This one has already being used with the Blast or L959 (brushless) by other peoples. It has good crititcs.

2. Emax ES9256 HV Digital Servo:
http://www.banggood.com/EMAX-ES9256-HV-Swash-With-Rotor-Tail-Digital-Servo-For-450-Helicopter-p-88191.html

This one is a HV servo. So it have a little better specs than the TrackStar. Look cool tooimage

Now the TrackStar one is a sure value. The other one i am not even sure if it can work with rc car. (yeah i am still a beginner with all this stuff)

The price + shipping is almost the same, i will probably go with the Trackstar but still the other one look interesthing.