Hi all, I am thinking about my hard disk options on a new iMac I plan on purchasing tomorrow. I just can't decide between getting fusion or ssd. Will it be faster to write to fusion drive or external usb 3? I will mainly be editing high res photos. Also If I get ssd and use another external usb 3 ssd will I see delays opening finder ? At the moment I get a huge delay on my MacBook when a usb 2 disk is plugged in.