I tried out a pair of the Athlon Ares last year in a head to head comparison between some japanese bushnell elite 10x42s, chinese vortex viper hd 10x42s, Nikon monarch 5 10x42s, and some other cheap ones i dont recall.
As far as center resolution and low light went they were far better than the others. The sweet spot in the center of the image wasnt very large and the edge to edge clarity left something to be desired (it wasnt far behind the bushnells or vipers, but neither of those were great either). Id say they are a better purchase than the viper hd 10x42s when it comes to optical performance. The step up to the $1000 range is worth it in my opinion if you use them a lot.