A robust set of legs is essential for stable, steady shots. However, it is the quality of the fluid head which puts you in control. A "true" fluid head, such as those made by Miller, Sachtler, etc., feature multi-plate drag modules for seamless stops and starts, and a modular approach to selecting degrees of drag with repeatable performance. A fluid head with a 'lubricated friction' approach to drag control, such as those made by Manfrotto, offers great value for money.