Fermentis states that US-05 likes 80 degree water, they go on to say plus or minus 6 degrees, bringing it down to 72 degrees a rather pitchable temperature.
From Fermentis on US-05
rehydration instructions
Sprinkle the yeast in minimum 10 times its weight of sterile water or wort at 27°c...
Brewmasters Warehouse is much better. I went from the low 60%'s buying crushed grains from Northern Brewer to the mid 70%'s buying from Brewmasters Warehouse. I made no other changes.