UPDATE: If anyone's curious about the fate of the OP...
the Snark and the D'Addario NS Micro worked pretty well. They hunted for the B string, but seemed to find it ok. Which one am I using in the pit for James? Neither. I was already resolved to pull my MXR compressor off the board and just put it next to my amp head. But then I realized how much I relied on my Source Audio programmable EQ. Finally I just had to give up and just bring the board into the pit. And the board, as you might imagine, has a tuner: a polytune mini, which works better than either headstock unit.
the Snark and the D'Addario NS Micro worked pretty well. They hunted for the B string, but seemed to find it ok. Which one am I using in the pit for James? Neither. I was already resolved to pull my MXR compressor off the board and just put it next to my amp head. But then I realized how much I relied on my Source Audio programmable EQ. Finally I just had to give up and just bring the board into the pit. And the board, as you might imagine, has a tuner: a polytune mini, which works better than either headstock unit.