There was a lot of discussion on other threads in the Endless-Sphere forums on that, and I had initially selected 3.85 as my target voltage, but on retrospection, 3.65v seems to be the sweet spot.

With the power curve on the battery, I had figured 2.8v as the low end. The Cycle Analyst has a low voltage cutoff to prevent overdraining of the batteries, but it's not granular to the cell level, so I figured on 2.8*12= 33.6v, and this is where having balanced cells comes in handy. I had wanted to go to 2.7v per cell, but the risk that one would hit 2.6v while another stays at 2.8v to compensate is too high.