I've been using the SignalCables in two of my systems for the past couple of years, so you could say they are time-proven (at least for me).
I'm not using many of their power cords though but I know I have at least one MagicPower cord in each system. You could go with all Silver Resolution or throw in a pair of their Analog Two interconnects somewhere in the chain to see if you like the resulting synergy. I do.
I generally like the Silver Resolution speaker cables, but have changed to Audio Metallurgy Gold Reference speaker cables in my main system. They sound very similar in balance to the SignalCable Silver Resolution, but are truly smooth as silk. These are definitely cost-effective cables as you have witnessed in your friend's system.
I'm not using many of their power cords though but I know I have at least one MagicPower cord in each system. You could go with all Silver Resolution or throw in a pair of their Analog Two interconnects somewhere in the chain to see if you like the resulting synergy. I do.
I generally like the Silver Resolution speaker cables, but have changed to Audio Metallurgy Gold Reference speaker cables in my main system. They sound very similar in balance to the SignalCable Silver Resolution, but are truly smooth as silk. These are definitely cost-effective cables as you have witnessed in your friend's system.