I agree. Especially since (the banshees' I'm thinking of) frighten living men to death in seconds, plus the stunning effects it has from a distance.
Different vampiric families could also help explain the differences between Auguste and Salthar.
I figured since Salthar is undead, a banshee's scream wouldn't have bothered him too much. As for blood drinking/ human food, I stick with a Underworld/ Warhammer vampire template. Blood only, or you risk your life, or are at least sick.
Just figured Aethalia would post, but I can write one now.