Killzone Blitz: Sunday

My Thunderhoof Brotherhood Calvary model for my Killzone Skirmishers.  The horns require better blending, but what I'm looking at here - and asking you to look at, as well - is the offsetting Space Wolves Gray.  This is the first model I've blocked out this way, but the color choice is important.

I've been told, locally and online, that the metal armor needs some contrast.  The Master Manipulator (every store needs one), Evil Homer, and Farseer Tim all mentioned the shoulder pads.  So the only question was what color.  (Yes, I'm going to drill the bolters...)

Ultimately I chose Space Wolves Gray to tie it back to that army.  The Brotherhood is a Counts-As, so making the connection a bit more obvious doesn't hurt.  Further, it's neutral enough that other accent colors won't blow the composition entirely.  In these three foot models, I've done a Tzeentch, Khorne, and Slaanesh (subtle) treatment; if the rest of the army has similar - and it will - I don't want the colors to riot.  So, does it work?  Is there a better color?

Here's another thing on the block.  Jay from Da Boyz mentioned Soul Grinders as a way to improve my comp score.  I think they can work in a comp environment, but only if there are two.  (One of a model in this class is worse than none.)  I'm thinking of using my Nurgle Daemon Prince as the third Heavy.