Nice! That looks awesome. I think a chest plate would add to the Halo look. I think a prop Halo gun would be a nice addition to round it out. It would be a little subscale (ok, a lot subscale) but you could do a boomco assault rifle repaint pretty cheap and easy. Not to be critical though, that's just what I would do if you want to be easily identified as a Halo Marine. I love tactical stuff too, so it's awesome either way.