These banners are an excellent choice for professional applications; they're complex enough to keep viewers interested, but not overly complicated.
Both of the banners use a complex prism as a focal point. A purple globe appears to orbit the space around each geometric shape, and white lines cut across to add to the texture. The simple font has a classic look, which creates an effective counterpoint to the futuristic approach.
The plain white of the background gives these banners a clean, modern look, and the subtle gradient on the prism contributes nicely to the effect.