"First things First",you have to find-em,that is where Your Binos come in.Not hard with quality light to see "Lopes" 3,4 miles away.Of course one can't tell how big they are at that long range but you have found them ??? Now when you close the distance,that is where Your Spotter comes in,as not to have to get within rifle range before you yea or ney on this buck.On your spotter,don't worry about high magnification as 45-60 power as the heat waves will wash out the image,usually 20 to 30 power is plenty for most Big Game hunts,taking most weather into consideration.And another thing,buy the Best spotter money can buy ??? Won't make abit of difference unless it is mounted on a Quality tripod to take the movement out of the equasion.Good Luck on your purchases --- Bruce & SilverGrand