Ok my system is almost set up and my Arcam AVR-250 Amp is arriving tomorrow. I also need a power cable for my EPOS ELS sub seeing as how they gave me JAP and US cables but no UK ones! Anyway, which piece of equipment would benefit most from a good power cable; the Amp or the Sub. Or do I really need good ones for both? Where is a good place to get reasonabley priced mains cables? Maplins? Also I've got some ferrite cores knocking around that came with my Viera TV which only seem to be needed if I use the connections on the front panel. I assume I could use these for these power cables too?