I am thinking of upgrading my mains cables, but not sure it is worth while on my system? My whole setup is around £2500 worth. In particular I have been recommended cables from Russ Andrews? I currently have all my equipment connected to a 5 socket adapter ('very' cheap one). Will I be best off relacing all of my mains cables, plus a decent 5 socket adapter? And how much should I ideally spend? Any advice would be great.