Gyro's really make stuff less fun. Just wrap electrical tape around the tires and drift away. As for what 1/10 or 1/16 car you should get, it comes down to more information from you.
Do you want a car purely for drifting, or one that could rally or drive grip as well?
What is your budget?
Do you want a counter-steer setup?
Do you plan on upgrading later?