Over the past 5 years, technological improvements in CD players has occurred. CD players are being introduced with higher sampling rates, low jitter, higher output voltage, better opamps, etc. My question is -- do these improvements actually lead to better sound quality, in general, or is mainly marketing hype? In other words, if CD players made 5 years ago were upgraded to today's technology, would they sound better?
Which factors are most important when evaluating the purchase of a CD player?