The March has been AWESOME so far Rob - rangefinding has been scarily spot on. From 16 degrees C to 35 degrees C it has shown no change at all.
I could have gotten away with the 10-60 though, as 80x in our bright sunlight is a waste. I have only used 60x a few times - mostly use it on 50x or even 40x, and spot on.
Steyr LG110FT - March 8-80x56 IR