I use Maya for my modeling.
The pauldron looks excellent! What avenue are you going to take for actually making the armor?
One thing that I would like to try is to make a custom helmet that is exactly like the helmets in The Wolf Brigade. I know a lot of people use old world war 2 helmets but I think they aren't very accurate and don't give off the same intimidating look that they should (maybe its the gap between the mask and helmet on the sides, from most of the reference pictures I have it seems to me that the helmet is fairly flush around the front and side of the mask, and the part that flares out around the back is longer vertically than most WW2 helmets).
I would love to give that a go when I get back from vacation and I'll post my progress here.