(The work of the awesome artist "Shimmering-Sword" on deviantart who you shuld totally check out)
[img]http://i.imgur.com/ZFvkJjQ.jpg[/img]

This is the closest I can get to portrait the Imperial ships for you, and I am honestly surprised that such a close match in desgin exists. I love these flat capital ships, and some of the more Halo like smaller frigates, but I generally go for the look above when I imagine scnese in my head.