Changed the power cord to SignalCable Magic Power cord on my CroMag II

I changed the stock power cord on my Cronus Magnum II today to the SignalCable Magic Power cord and the results left me speechless. I can’t believe the difference it makes to the sound quality. It just opened up everything...the highs and lows. The soundstage is so much better now...it's like I’m listening to a different amp. One of the CDs that I always test with, Eric Clapton unplugged sounds amazing. Every change to my system seems to be getting me closer to the sound that I want to hear. Initially, I thought it was the speakers so I upgraded from a decent set of Dynaudio speakers to very good set of Harbeth C7 speakers and the sound improved but not significantly. Changing the power cord was a night and day difference in the sound quality...wow. Can you guys suggestion some other relatively cheap changes to improve the sound? Anybody witness similar realizations?