Welcome to Librarium Online!
I've been going down the extravaganza road lately with 500pts lists (as that's what most people I know have painted, although I've got 4K of ogres), including a giant with my night gobbos, a bull rhinox with my ogres, a varghulf with VC and next up on the list are the blood knights :rofl
avatar of death
10 ghouls (+vamp)
4 blood knights
good job but you should have the vamp. in the Bloodknight with the Dread Knight power instead of avatar of death. just use the Kastellan Model as your Vamp. and paint him black or brown. I have found that a vamp. riding a nightmare with a shield isn't out yet other than the old model (witch i think sucks but o well) and the Kastellan Model rocks when you mess around with him.