I hate to repeat myself, but the basic imperial version is going to have the simple imperial gray theme. However, do keep in mind that what you see here are renders. Depending on the lighting, some of the weathering and color can look a bit "bleached out", even if it brings out other detail. In the game, one has the option to actually bring out the color of the weathering, since the final look is accomplished by a blend of diffuse, specular, glow and normal maps. So, I wish this wouldn't degrade into a "add your pattern" brainstorming session. Once the final game maps are done it'll look good in-game. And again, there will be other variants.