There's a jquery plugin out there somewhere that loads the full width background image first, then fades it in. I think it would suit you much better.
Honestly, it's a nice site, but with only a 30 second loop of rain I am very disappoint. Your competition is http://www.rainymood.com and http://www.naturesoundsfor.me . If you're worried about bandwidth ditch the background images, minify all of the code, and extend the rain sample as it's the most important content of this site. I'd rather have a single image for the background and a longer loop sample, than a shorter loop sample and multiple background images rotating.
Honestly, it's a nice site, but with only a 30 second loop of rain I am very disappoint. Your competition is http://www.rainymood.com and http://www.naturesoundsfor.me . If you're worried about bandwidth ditch the background images, minify all of the code, and extend the rain sample as it's the most important content of this site. I'd rather have a single image for the background and a longer loop sample, than a shorter loop sample and multiple background images rotating.