Here is a look at my rather large Imperial Knight army. It comes in two flavors, the big boys and the little guys. I really enjoy running a hoard of the small Armiger War Graives backed by a few of the Helverins. The army packs is a punch and is mobile and fun to play. They tend to get pinned down by low lever troops though, do I have to be careful how I run them.
Plus just the sight of twelve of these things coming at you it a bit much.
The big boys are just fun to play, but not very competitive.
Note that on a lot of the War Graives I repaced the heads with spare warhound heads from the Titan game.