The only way to answer your question is to know the starting point. As alluded to by another responder, if you spend 1K upgrading components in what was a 1K total system, that might make sense improve componentry,especially speakers if they were weak to begin with. However, if you spend 1k upgrading a 5-kk system, them the greater impact could come from cables. I have recently started experimenting and have found that far smaller investments in cabling can make far larger differences. But again, while my total system was about 6K, the weak links (no pun intended) were the best buy stock monster cable interconnects and speaker wire. I am now experimenting with Nordost interconnect (sonic wind made a huge difference) and the Flatline gold II speaker connects. I am less sure about the speaker wire and will be experimenting with other manufacturers. But for a total of less than $500, the sonic improvement (in both interconnect and speaker cable) has been staggering.
