56k on your end, but why didn't you upload it and then link,..
And why .png? your pic is 1.3meg I saved it and made a .jpg (Tell me the extra weight is/was woth it.)
I know Fyron is an advocate for .png but for most images (especially images like your wallpaper) are more than happy as .jpg. Sure keep an original uncompressed .bmp or .png but for posting imho .jpg is much better.
Nuf said, Cheers!
P.S. BTW that is a very nice rendering, good job.