If you want one to play with, get a Shooting Chrony. Thats what I got for now. If you shoot at ranges that are covered, consider the millenium models. They can shoot in darker places. If you want one for life, and would use religously, get an Oehler.

I don't mind my f-1, I got a printer for it, so at my range, I can put it out there under sky or light.