Dread Vanguard Antipaladin Options?

I'm going to be playing in an Underdark campaign and I really love the idea of a Drow Dread Vanguard Antipaladin (I know they aren't exactly optimal for it due to the Con penalty.) But I've never built a paladin or an antipaladin. Any particular feats that are really good? Or even any drow racial traits that are worth taking for an antipaladin?