There are a lot of good options out there for under $800. I would personally go with the Printrbot Jr. Version 2 for $699. It does pretty much everything any other printer under $1000 does, and it is easy and simple to use. I've used one and have had no problems with it. Setup was very easy, and there really isn't much to do in terms of maintaining it. It takes a little bit of reading the directions but that is required no matter what printer you purchase.

More details on it at: http://printrbot.com/

Larry