Took two sacrificial plastic Junkers and gave them very quick & dirty paint jobs in the two colour schemes I'd been thinking of.
Originally, was just going to use the colours from the Void/Junkers books - I quite like them, and it would save me some thinking time!
BUT, I also like to try and make an army "mine", and not just "copy" a scheme.
I'd been thinking along the lines of Roman armies (as that's where all the unit names etc conjure up).
So, there's a grey bodysuit with red armour (based on the books) and a red bodysuit with metallic armour (based on Roman legionaries).
I'm partial to both of these - if I had a whole army in either scheme then it would look quite impressive.
Will think on it through the week and then see what one comes out on top...