Since I think the firmer the better, I posted the 'hard' option. I sleep quite well on the floor, seems to do wonders for my back problems. We have a tempurpedic, which I really like, but the wife wouldn't let me get the most firm option so I sink into it too much.

The number one indicator of whether or not I'll have a good night's sleep is what's under my head. If I have good neck support I can sleep on a rock, but if my head and neck are all twisted up I'll probably end up staying awake all night.