Please note that there are spoilers below. The excellent Destiny informational site [url]destinydb.info[/url] has a ton of spoiler info, including a list of exotic marks, cloaks and bonds. They are all listed as having perks, but we don't know what any of the perks are. It has been confirmed that we can only wear one piece of exotic armor at a time. I think it is a reasonable deduction that the perks from exotic class armor must be significant to entice players to use a class armor exotic instead of a chest plate or helmet. Thoughts?