OK. I played around with a random Blood Angels banner I found via Google (https://lh4.googleusercontent.com/_-HZLorI1B0w/SC-CFFRkyGI/AAAAAAAACd4/ZImgg08ETvk/s800/Blood%20Angels%20Chapter%20banner.jpg).
At 110%, it looks quite awesome. I'm very interested now. I'll be designing my own banner images in the coming months (as soon as I find some free time).