Just saw that Lonely Planet have put up an article on great hikes around the world. Number one is the W track, Torres del Paine. Have ticked that box! Was an awesome five days. Have not yet posted picks as was an epic trip and still working through the material. Should have something up next week though.
The article for those interested: http://www.lonelyplanet.com/themes/adventure-travel/the-worlds-best-multi-day-treks-without-high-altitudes/?intaffil=lpemail