I was actually never a fan of the current splash image for a couple of reasons, but the primary one is that it looks too intense. Intensity isn't your message so I'm glad there will be joy in your new splash photo.
I placed the text of the splash page over the photos to give you a basic idea of how the image will look once it's on the site. The image will have to be darkened somewhat for the white text to pop. The other option is to leave the exposure the same and add a slight drop shadow to the text. A drop shadow can be added to live text.
I shot the photos at 1/500th of a second. Due to the lighting conditions, a higher than optimal ISO setting had to be used, but a balance had to be struck in order to freeze the action. The salmon were moving faster than Jaison (think throwing a baseball) so they are not in sharp focus, nor do I believe they have to be, as the blur suggests motion.
Have a look at the images below and let me know what you think. I have my favorites, but it isn't my decision, so have at it!
In no particular order, starting with the current image.
OK, I admit it, this is my favorite.