KNIGHTS OF THE WHITE WOLF
Knights of the White Wolf are the entire reason I started collecting an Empire army. I think they're a really evocative unit and they look great in Warhammer. The characters blister has a single model that I presume is supposed to represent the Grand Master of the Knights of the White Wolf. By judicious swapping and calling in of favours I managed to get myself 12 of this model, enough to make an entire unit.
I painted these guys in their traditional red colours.
The book Hammers of Ulric has loads of great information about these awesome templar knights, and the city of Middenheim in general.
Any future units of knights will just use the standard Knight models, although I'll use the colours of Middenheim or Middenland. I'm even a bit tempted by a unit of the new Knights Panther models. According to Hammers of Ulric Middenheim is home to a unit of these knights as well as White Wolves.