We typically recommend Manfrotto's fluid heads and ball heads, here are our two favorites:
Fluid head: The Manfrotto 502HD with a flat base
The Manfrotto 502HD is a fantastic sturdy fluid head, allowing for smooth pans, tilts and overall control of the camera.
Ball head: The Manfrotto 496RC2.
The Manfrotto 496RC2 is a great ball head for time lapse shots. Simply position your camera at the angle you wish, lock the head down and start shooting!