I also recommend starting with a power conditioner; even if you have a dedicated AC line. The noise level will be lowered and you will hear the true sound of your system, the sound will be more open and soundstaging improved.
Power cables are important as well, but once you've lowered the noise floor, then you can make educated choices on the next cables to upgrade. IMO, upgrading interconnects will help influence the timbre or color of the system.
Power cables are important as well, but once you've lowered the noise floor, then you can make educated choices on the next cables to upgrade. IMO, upgrading interconnects will help influence the timbre or color of the system.