So I finally got around to ordering some powder from PowderInc, figuring that none of it is bound to get any cheaper, and who knows when some in D.C. will decide that the American people can't be trusted with real black powder anymore.
I stuck with GOEX, as it seems to be an all-around ideal powder with good reviews across the board. I opted for 15 cans of 3Fg, 9 cans of 2Fg and 1 can of 4Fg. I figured I should at least try some 4Fg as a primer, though most shooters seem to find 3Fg does fine in the pan.
Mainly, I like the idea of getting multiple cans of the same lot, as it will take years to shoot it, and I can expect it to be reasonably reliable over the years (if stored correctly).