Since you intend to play modern fighters on it, make it modern fighter themed.
There is probably some high res artwork out there for King of Fighters XIII since it just came out on Steam. (kinda sucks that the colors are similar to what you already have)
Same goes for Mortal Kombat Komplete & SSFIVAE.
If you don't want it to be game specific, there are some multi-fighting game wallpapers out there:
http://www.wallsave.com/wallpapers/1920x1080/yugo/2852609/yugo-fighting-games-forever-by-jinxonhog-on-deviantart-2852609.jpgYou could call it Fight! or Flawless Victory or Brian Wins! or Throwdown or name it after any late 80's fighting movie.

The current fighting games all seem to make use of fire in the artwork.
EDIT: The base should be bright white and the top part black. (the reverse would make it look like a golf game)