I have banners on several of my handi barrels and am very happy with them, but none are more powerful than 3-9 power. They are clear, bright and very reasonably priced. I have looked at the banner, and the bushnell trophy in a 6-18 and 6-24 power, and am not nearly as impressed with them as the lower powered models. They seem to get very hazy and washed out at the higher magnifications. I am now considering a bushnell legend, or a Mueller APV. Both seem to be much better at the higher magnification, and still reasonably priced.
Kevin