In reference to the bolded I agree, but not 100%. For someone like me who comes from an entry-level setup the move to better quality of sound has to involve spending more money, but were not talking 'what's best" money here. As some of you know, I have embarked on that process and the results so far have been well worth the expenditures, and I hope that more are coming in the not too distant future. However, I do believe there is a point whereby spending more significantly reduces the cost vs quality ratio, and that is the sweet point I personally would like to find. I also think that "sweet spot" is not all that far away, because I honestly and truly believe there is affordable and high quality gear out there at prices that don't offend.
"What's Best" is different for everyone, but we can all have "what's best" based on our own requirements and levels of satisfaction.
John,
You will never be able to beat the cost versus quality of buying a ticket for a real performance in good listening conditions.
I was not addressing the cost vs performance ratio, but only the trend in general. Forget the derivative, I was thinking about much simpler things!