Zeiss 10x42 Terra EDs in a S4 harness for turkeys.
I could be glassing turkeys through open mountain hardwoods at 250 yards in Appalachia or out west on a high point looking at turkeys at a mile and a half away.
For me, 10x is the perfect magnification regardless of where I'm at in the US. That magnification has undoubtedly saved me countless miles of walking many, many times in my travels.