There are studies that indicate that runners wearing $100+ shoes are much more prone to injury than runners wearing sub-$50 shoes. In fact, what's initially "comfortable" insulates our feet from important physical signals, leading to a lot of physical pain. (read the recent, excellent book "Born To Run" if you find this interesting)
My point is that not thinking about decisions "makes you a loser", and equating price with quality is often a mistake.
And since when did homo sapiens evolve to need a $600 matress? Folks around the world sleep on a futon, or the floor. Do they all get terrible sleep? Or do they adapt.
...or do they actually, in many circumstances, thrive because we've evolved to live under "thrifty" pre-industrial conditions? In the book I referenced (Born To Run), the author describes an extremely isolated Mexican tribe where 40-50 year old men regularly run 50-mile plus races in bare feet, in good part, many believe, because they've shunned shoes. I wouldn't be surprised if we come to the same conclusion about mattresses.
Again, I'm just throwing this in because I think it's best to think flexibly. I also often argue that it makes perfect sense to splurge on a $60 massage or a $75 per person meal every now and then because memorable experiences are surprisingly valuable and more permanent (in one's mind) than they might appear to the impulsively thrifty consumer.
My point is that not thinking about decisions "makes you a loser", and equating price with quality is often a mistake.