I've got a Ruger Mark III heading in, and its drilled and tapped for a scope, so I'd like to try mounting a scope to it. I'm not interested in a red dot scope, and most of my shooting would be at 25 yards or less - although I occasionally have access to a range with a 100 yard target distance. I know everyone says I should avoid a cheap scope but I don't want to spend more than $150, so what would your recommendations be?