Rusty and I got the Samsung HE sanitizing washer and dryer combo for our 4th Anniversary gift to each other, we've actually had these and been enjoying them for a while (we used a coupon for no-interest financing and made ourselves pay them off just in time for our anniversary). We have bought our presents together for the past four years and used
http://www.findgift.com/Anniversary-Table/ as a guide to help us pick our gifts, and here is what we've accumulated so far:
1. A tree (it's actually still alive) since paper is made from trees.
2. King size mattress for cotton.
3. Leather couch and recliner.
4. Washer and dryer for the modern appliance gift.