A 3-9 variable gives you a wide enough range for shooting at the distances that you noted ... and mucgh farther. A quality 40 mm is an excellent choice.

My experience with the Ziess Conquest line has been outstanding. I have, and have had, a lot of different makes and models of scopes over these past 50+ years. MSRP from about $35 to abut $2500. For the $$$ the Conquest is probably best buy that I have come across.