Issue is resolved, was something strange going on in my slicer(s) with sphere prints. Not sure what all contributes, but it was having 4 perimeters + 4 bottom layers. I lowered that to 3 perimeter, 2 bottom layers, and they print beautifully. Worked to resolve it in both s3d & slic3r.
As for the steppers, I did lower the currents a tad from where they were. Didn't have to be 50%, but did have to go down some.