Dungeons, Fun factor and rewards?
3 runs at 60 each will let you pick between shoulders gloves boots
Chest legs and Weapons cost more
You can preview all of the armor and weapons by going to Lion’s Arch. In the southern part of the map, near the exit to Bloodtide Coast (I think that’s what it is?), there’s a small fort area with a bunch of Asura gates leading to WvW as well as a ton of vendors just lined up. Those vendors take dungeon tokens that are received by running exploration modes of different dungeons. Each vendor only takes one kind of dungeon token, and the armor/weapons that vendor provides is based on that dungeon. Just right click and preview to see what you might want to work towards.
Also, if you want to preview the armors, go to the second tab to see the level 80 versions of the armor, which actually have their own unique skins. I think the lower level versions use a generic appearance.