It depends on your height:
Since, I am over six foot - I use the Anderson Tall Man Composit Straigth Shaft, and really like it.
With this longer shaft, you have to be very careful when removing the protective coil cover, aka skid plate to remove sand trapped between the bottom of the coil and the skid plate, which I have to do about every one to two hours to prevent loss of sensitivity/false signals from the accumulated sand.
As the shaft is long, it is easy to accidently push the exposed cable into the sand (head phone - if control pod is normally mounted, or cable to battery pod, if control pod is mounted upside down - to keep headphones from being jerked of your ears each time when you squat/bend down to retrieve target).
I experience two failures which required factory repair as a result of the exposed cables being pushed against the sand (pulled pins / intermittent connection in the cable) to the battery pod.
. When I do beach hunt it's hours at a time, looking for a shaft I can mount my machine to, I don't use a hip or vest mount. Thanks