I've been blown away by Amy B's All the Sinners Saints series.  Unrepentant, five by five Faith meets soulless Spike and helps him take care of that nasty chip. 

And because I'm such a tease: 

In the space of an instant she found herself pinned to the wall, lean muscle against her front as effective as the plaster behind her at holding her in place. Glacial blue eyes held hers, and a sinister smile crossed his face as he leaned towards her, hovering over her throat before moving until his mouth was inches from hers. “Slayer fear still smells as good as I remember.”

Now go on, you know you wanna:

http://www.shadows-and-dust.co.uk/Fiction14/allthesinnerssaints.htm