This is a topic that some people take way too seriously. The one factor you have no control over is the recording.Some recordings are inverted, and some aren't. So, regardless of how you set your gear up, you'll always be off on some of your music. The only practical solution, is some preamps and sources have a phase invert button on the remote. If you don't have one, I wouldn't worry about it. Unless you have a lot of listening experience and some very detailed gear, you're not likely to notice a difference. By all means experiment, but your time and money is better spent elsewhere.