I found that getting married and having a kid changed that for me. Significantly.

Diminishing returns happen at a dollar amount that’s directly proportional to your disposable income.

I have both. I prefer the Q4, as it’s the most compatible with all my devices.

I really like my Audio Technica ATH-M50x’s. I don’t need an EQ or an amp with them. My almost-issue with them would be the soundstage, but even that isn’t bad.

My X2HRs distort when plugged into my laptop. Plugging them into an amp removes this distortion.