Although I have not used one,Leupold has a rangefinderthat sounds awesome.Can supposedly mark a deer to within a yard out to 550 yrds.The only reason I mention the leupold is that right now,if you buy a rangefinder,you get a free 3x9x40 scope worth $200.The rangefinder is in the $650-$750 range.Just look online for your best deal.