Where can i get a FRESH Windows 8 iso? (LEGALLY)

Hey guys,

I wanted to know where you can get a Windows 8 iso, NOT a upgrade iso.

I already did some googleing, and http://www.redmondpie.com/download-windows-8-iso-x86-x64-file-directly-from-micr osoft/ this website seemed to tell me you can get it by downloading a file from Microsoft and just entering a product Key.

However, for this i think you actually need a Windows 7 , because it is an UPGRADE iso, not a fresh system-builder iso.

So i was wondering, where can you get a fresh Windows 8 iso to install on my MacBook, which doesn't have Windows 7?

Or can you use the iso described in remondpie and use it to install Windows 8?

Thanks!

PS According to many people, the new MAcBook Air (2013) which i have does not work really well when you install windows with a CD. That's why i'm trying to use a USB and iso to download it.