Though I wanted to wait until I had the whole collection done, the joy of getting this one finished has made me decide to post it early.
Behold, the Mark V (aka Silver Centurion armor).
The reason it doesn't have Iron Man's signature gold and red color scheme is because due to the fact that in order to have it able to collapse into a suitcase, Tony had to sacrifice the ability for this suit to fly, therefore not needing the gold-titanium alloy that prevents icing at higher altitudes.
Faceplate, hands, and boots were based on Shade13's, which were modified versions of mine, so it sort of has come full circle.
It seems I'm always rubbish at legs... eh, it don't look awful.