Which cable do you think is most important?

Speaker, Interconnect, power.

1. Power cables for all unless components have battery operation. Make sure they exist and connected!
2. Speaker cables (unless you use headphones) only if connected properly
3. All amp preamp and source interconnect wires (if you use ipod docking station you won't need interconnects)

Example: my digital system consists of Alesis ML9600 CD/HDD-player/recorder and AKG K701 headphones. In this case the only important cable I have is Power cable. Para's 2 and 3 are not important.

The one that connects to the Forums/Cables.

Ghstudio is right. Get your room as perfect as it can be and then worry about cabling. The speaker/room interaction is the most under-tweaked aspect of 99% of the systems out there. If you do not feel capable of doing this, consider having a professional firm come in and help you. Rives is well-known on this site....

-RW-

Would your wife allow you to treat your living room for better acoustics? ;-)

My system is in my living room and those tweaks would not pass WAF. So, room treatment would not be much of an option for me, except changing rugs. My living room is about 25x30 with wooden floor. 5x7 rugs in between the system and listening position.