A guy on Reddit posted a website that he made that shows all of the exotic armor sets in GW2 and how to get said armor set. It is easy to browse and all information you needed are there on the site, including where and how to get the armor, the items you need and even armor stats. Sadly it does not include cultural armor sets but it is still a great site.
Check it out, here: http://www.gw2armor.com/
Today's OST: Guild Wars Nightfall Theme Song