Originally Posted by rowan

8000px?? At a 3:2 aspect ratio that would be a 42 megapixel image!

I've seen 6000px (24mp) on hegre archives, where are they advertising 8000px?

My opinion... offer more than one size, and prepare for the future: keep the original size so you can progressively update the largest size you offer as people's monitors grow (assuming it's not the native size)