I had an idea for a rare item spawn. What if you could have a unique item spawn once say in a chest from a map. This item will only last for 2 months and then it will disappear and respawn. The item could be marginally better than the magics out there now. Also giving it name would add to the cool factor. That way it will not get stored in someones house forever but it will be in use. You could make several unique items armor, clothes, and weapons of diff types.
Also I was thinking about on quests the possibility of rare house deeds being found. I believe there are utils to design houses. There could be houses like necromancer's tower, Alchemists lab, Druid alcove and such. Even a manor home that came somewhat predecorated. Just a thought.