I would think the Bushnell Elite 3200 4-12x40 would be a fine choice from the Optic Zone at $239, or maybe the Mueller 4-16x50 Sport Dot from Mueller. I've heard a lot of bad stuff about the current and recent generation of Tasco, enough that a lot of shooters that have had them now call them Trashco. I've heard some praise for them also, but it appears to me that you need to be lucky to get a good one in the bunch. I would definetly change out the scope and eliminate the optic from the variables, also check and make sure the rings are tight while doing the swap if you are using CZ rings. How's the crown on the barrel? Take a good look at it to make sure it isn't damaged, it should look centered and symetrical, the same all the way around with a crisp edge to the bore. Other than loose mounting, or a bad crown, I would think the CZ should be a great shooter. Good luck!