RE: Which of these three scopes would you choose?
Leupold hands down. I' ve heard good things about Zeiss, but would still go with the Leupold. Have you considered the M8 Leupold? It is a fixed 6 power scope x 42mm scope. I' ve hunted with one for 10 yrs or so now and it is fantastic in low light condition, and has work well on deer sized game out passed 300 yrds.
Doug