One of the points that enabled your good gear to work under better conditions now is that you have less of the neighbours influencing the cleanliness of your current. Then you have no dimmers and computers (which put some HF back into the circuit)at the same circuit like the gear responsible for the sound. You could add one or more hi-end-hifi AC filters and get even cleaner current.Also keep analog and digital gear separate. The better your amps, cables and speakers are, the more they can show you what they really can do then. You will hear fine differences like the ones between cables easier now.
Congratulations from Berlin
Kalle