A loud buzzer is a good thing, but also the SMD ones I bought work well, while not being the loudest.
If you've lost you quad in an 200x200 meter field you are screwed anyways - unless you have some FPV gear. I find using the FPV signal to figure out the approximate direction of the quad quite comfortable. I just go into the direction with the best signal until I can make out the buzzer.
I prefer the SMD ones for their almost quadratic form factor, makes it super easy to mount them.
But now I also have to get some of those kingstate buzzers
How difficult is it to get a buzzer on the Alien F3 Quad v1?