I work at a public range so in a very short time, I've seen all the options.
Chrony base model
If you are budget minded the Chrony is fine even though it's the lower end. The other optical models work well but I don't think the return on investment is as good.
The Oelher is the gold standard.
On a day to day basis the Magnetospeed is neeto
. It has some challenges with air rifles bot it is MY GO TO CHRONOGRAPH