I finally got a 200-400 lens and now need a new tripod and head, BUT my wallet is EMPTY. Has anyone had any experience with the 3421 gimbal type head? How does it compare to a Wimberly or Jobu Black Widow? Am I wasting money by purchasing the Bogen? I really want to use this lens to it's best potential but $$ is tight. Will I be disappointed with the Bogen? THANKS for your help!