I just stick with the cheapo Tasco/Bushnell. I haven't had a problem with them. I use a flat shooting .243 tack driver as well. My goal is to always place a shot well. I can't bring myself to pull the trigger until I'm certain of a good hit. It's zeroed at 200yds to ensure maximum flatness over maximum range, so I don't have to think about elevation. I thought about tweaking it up to 250yds to get the farthest reaching trajectory within what I call flat, but that's pushing it, and I wouldn't knowingly take a shot past 300yds anyway since I'm not that steady of a shot.