I have recently done the ESP Logo designs for the client.
The client wanted to see the ESP logo in Yin & Yang as an 'E' to go to the left side and the 'P' to go to the right side.
Here are other sketches showiing similar logos of the Yin & Yang symbol.
These are other ideas from a range of logos to show the client so he could choose which one he thought would be the best for the website (logo/banner) .
This is the final logo/banner of ESP Football & Soccer.