picture decision

Okay so on my forum, i have the index of course and when you click on one of the links it will lead you to another page filled with more links and pictures to go to and play games and chat. In the links, i am having trouble with the pictures. For example, here is a picture for a link i have in the welcome section on the home page:

I have had that background picture for a long time and it is starting to get old. I have tried to google pictures on google and bing but i can't find anything that will look good on my forum. Also, none that i has found will look good blended with anything. So if you could take a look at my forum and try to suggest some pictures you think will look good then that will be very much appreciated. I just need suggestions.

Here is my forum: http://winxforevermagic.crazy4us.com/

This is where my picture came from: http://winxforevermagic.crazy4us.com/f1-welcome-to-winx-forever-magic

Thank you!!!