Was it only me who, when I read the title, immediately imagined a stealth suit transforming into Optimus Prime.
Man that would be cool!
Anyway, on a more serious note, the stealth suits are v. cool but i would add a bit more electric arcs etc. around the transforming area to make it a bit more obvious whats happening but otherwise I think they're damn cool!
The rest of the models are very well painted as well, I like the clean painting style, and I kinda like the back-to-front drones.
You could have a stealth suit being shot and the armour malfunctioning in that area (the rest of the suit being in camoflage).