I am mainly in "the source" camp, but also a strong believer in system/room integration, which has to do with the speakers/amps match as well as the room. I also agree with priority to good electricity. If I could design a sound room and system today, I might start from a different proposition, maybe speakers rather than source. But my system has evolved based on existing rooms. My main strategy has been to invest mostly in the source, and then, into the best preamp, amp and speakers. Why? Because, unless you have a good source, you will never be sure what the components further down the chain are doing - or not doing.