Another vote for power cords, most important. Speaker cables and interconnects tied for second/third place.
Which Cables Are of Most Importance?
In a hi-end system, McIntosh, B&W, which cables will give me the most bang for the buck between IC's, speaker, power and HDMI? Which cables are most important and which are least important? Will concentrating my $$ in any one or two cables give me the most bang for the buck?