i'd love to see some close-ups of the knights - from the current photos they look pretty nice
the one problem i find with models that are mainly metalic is you need to add in some more depth - try highlighting up the taberds and chapter icon a bit. (if it is i'm sorry, but i can't really tell in the group shot there!)
you could also try adding in some basic heraldic fields on the blank shoulder pad and ther termies shields too. i did this when painting my mate's grey knights, and it *really* helps to off-set the high amount of metal on the models
also, the dread, while a very nice playing piece could do with some shading & highlighting as he looks quite flat as is...
try mixing up some brown/chestnut/flesh inks with a bit of chaos black and water it all down - it'll give you a nice 'weathered' look that you can then highlight back up and it will again really help to give alot more definition to your model!
overall it's a great base that with a little bit more work will look truely awe-inspiring!
hope this helps,
cheers!