A "good NP air rifle" depends significantly on what your budget is, it's intended use, and your willingness to compromise. If you can spell out at least the first two, it would be a lot easier to make suggestions (and answer the third part). So to be clear: how much are you looking to spend (let's say max dollar amount), and what are you intending to use it for (hunting, plinking, back yard target shooting, competitive shooting, etc.)?