@phillyb You made a lot of great points and I agree with the majority of them. However, your biggest point that highlighted in bold, sounds great on paper but problematic in practicality.
"The best sound investment is in your room acoustics and making your room audio-only with a proper speaker setup. "
What's wrong with this?
1) Well, most of us can only modify a room to a certain degree, usually a rug, some wall treatments here and there. We cannot go full-on audio treatment mode in a room for many reasons.
2) Even having a lot of treatments is problematic in itself, it is something not easily gotten right.
3) It suggests that we should focus mainly on the room and mostly negate other aspects. Head-fi is primarily headphones, no room treatments, and they still care significantly about their cables. It's true.
Btw, if anyone can teach me how to properly quote a post, that would be highly appreciated.

