Has anyone used the Bushnell 6500 tactical? Its down to that or a Mark 4 with a second sighting system (for 100 yards or less). I can get the Mark 4 cheaper than the Bushnell by about $200. I know that the glass is better in the Leupold, but I'm very interested in the 2.5-16 variable power of the bushnell. the leupold would be the 4.5-14.