I have the Mueller APT (4.5-14 AO) as well and I couldn't be happier. Mine's mounted on one of my Savage .22's. You didn't say what caliber rifle you're mounting it on or what you intend to use it for. I also have a 6-18x barska on a Marlin 25a? in .22 mag, a 4-12x simmons pro hunter on a glenfield 60 and a tasco and bsa collecting dust. IMO, the Mueller is waaaay better than the others. Well worth $129 shipped. I think pretty much anything will work for punching paper as long as it holds zero. I would go for something with higher magnification if that's all it'll be used for. If it's for hunting that's a different story.