The link you sent just goes to the front page of the board's site. But if you are sure that is your MB in the link, then any of the ones on the download/BIOS page will be the correct one. The newer versions have been added over time as fixes and improvements come along. Get the latest; version F7 (or F8a BETA).
If your MB has rev 1.0 or 1.1 in the corner by the audio header, that is the correct BIOS. Don't worry about the pic of the MB, they probably took those pics when the MB first came out and had no reason to change them.
Generally you can roll back the BIOS if you find some reason the new one doesn't work well for you, but that almost never occurs.