I've used Elephant FF, Goex FF and FFF, Schuetzen FF and FFF, and Swiss FF in my .54. I will never use Elephant again. I consider Goex and Schuetzen about equal, but I am a Swiss convert. Once I shoot through all my Goex and Schuetzen, I will stick with Swiss FFg. Maine Powder House, Upper Missouri Trading Co., and Powder Inc. sell Swiss for about 40-50% more than what Goex is commonly available for, and it is TOTALLY worth it! You can actually reduce your charge volume by about 15-20% with Swiss and get the same performance as with Goex or Schuetzen.
Maine, Upper Mo, and Track of the Wolf will sell powder only in 25 or 50 pound lots, but looks like Powder Inc., will sell 5 and 10-pound lots. You pay more per unit, but for those who only shoot a pound or so a year, it might be worth it.