The NFs I have and had have been great as far as res. go, 56s better than 50s, most I've seen anyway, although most I have are 50s. I have seen IORs that were absolutely outstanding, I mean as good as anything I have seen, but I have also seen more dudds in their line than the NF. If you can try not to buy sight unseen or order several peices if possible and pick the best. You would be suprised how scopes of the same make and model vary, even in top makes. I think NF is more conistant and the name recognition along with resale make them hard to beat with almost anything for their intended pourpose. Are you using them for hunting or range work or both.