I have a 20 amp dedicated circuit with 10AWG Romex in the wall...
Also, I have a slab of 2 inch thick Europeen maple (Sycomore) under each component.
As for my girlfriend, she's very good with me. She likes auditionning some gear and also playing with speaker placement. She's just against spending a couple of grands on some more gear that will make my system sound a bit better. She thinks the system is good enough like that. But on the other hand, myself never being satisfied, it's never good enough.