Frank Patrick points to this piece by Seth Godin (and a few other related pieces) on the concept of "good enough". Here's the riff from Seth I want to highlight:

I don't think so. I think that the open nature of the web and the hypercompetitive environment of worldwide competition are pushing things in two different directions at the same time. First, the hyper-cheap, sort of junky stuff that discounters and others want to sell in volume. And second, the relentless pursuit of better. (RPB). RPB is the opposite of good enough. It's not Jack Welch's six sigma nonsense in which engineers codify mediocrity. It's a consistent posture of changing the rules on an ongoing basis.

Well, that all depends on what "better" is, with respect to things like cost. For instance - I could own a better car than I do. It might cost me a ton more money though, and give me years of car payments. Am I "settling" by staying with the late model sedan, or deciding that I'd rather spend the money elsewhere? Opportunity cost plays a large role in any supposed pursuit of "better", because virtually no decision - business or personal - is made in isolation.