What is the best rangefinder to get a read on deer size targets out to 8-900yrds? I have a bushnell that will only get me out to around 400yrds and am looking at the Leica 1000 or 1600 but don't need the ballistic calculator built in. And I need it to read on animals not just reflective targets at that distance. Please let me know what you think is best.