I took the Newtons back and got a pair of Brooks.
Maybe at another time, when I'm not pushing to train for so many upcoming races. Maybe I should have tried them out in April, when my race season started to die down a little. As it is...I've got the Haunted Hustle 5k next weekend, the Aids Walk Atlanta 5K after that, the Monster Dash 10k, then a week later the Rock n Roll Savannah Half. Too much training to try to change how I run.
In the meantime, I'll work on trying to change my foot strike on my own so when/if I try the Newtons again, maybe it will go better.