I have bad eyesight so lets get that out of the way first. I'm considering purchasing my 1st entry level AR (likely a S&W Sport). Our club runs 3 gun competition but they only shoot steel plates at 100 yds with rifle leg. What would you suggest (for me and my aging eyes) a scope or red dot at the 100 yd distance? I'm open to suggestions for optic brands and models but keep in mind that my budget is low <$150 for an optic. This won't be a >100 yard bench rest rifle and speed of target acquisition and perhaps some magnification are high on my priority list.