Hieukm, maybe I can take a stab at answering why this happened and why the forum thinks SETs is always the answer (as mentioned in the OP)
The Onion: Area Man Moves to SET Horns and listens to music
Actually, when I was initially searching, I was looking for SS amps for Apogees or SETs for horns. Then, I saw that the forum founder Steve, instead of looking at say, Dagostino for his big Wilsons, realized SETs was the answer.
Then I saw that despite me and others telling Ron he should use SS for his big Gryphons, for quite a while he thought SETs was the answer. In fact, he started many threads asking questions about NATs, Mastersound, Audio Music, etc - whatever the questions, he seemed to think SETs was the answer.
Then I debated a lot with Audiocrack regarding SS amps for his big Tidals, but he said SETs was the answer, and grounding SETs bought tears to his eyes.
I then told Micro he should try a Dagostino for his big Wilsons, but he said SETs was the answer, and bought Lamms from Mike, who had just finished running a 2000+ post thread saying SETs was not always the answer (c'mon Mike get on with the program)
Looking at all the experienced audiophiles with big budgets who have been around for years choosing SETs for their inefficient speakers, impressionable people like me thought SETs was always the answer. And that's how the SETs was won.
Now that this debate was settled, we headed over to Tang's thread, where he was running music videos on SETs + horns helped set up by a guy with SETs + horns with records bought from a guy with SETs + horns. The thread is closely followed by me, Bill, Tao, Kodomo, Brad, Christoph, all fans of SETs + horns. Folsom and Peter also follow, and they don't have SETs horns, but as the OP mentioned, not everyone is objective. Am sure Marc follows it, as I remember reading about Zus in that thread, and he also has SETs. You follow it, and you don't have SETs, but you have Cessaros.
That explains how it moved from what's best to just listening to Tang's music. Which, btw, has to do with neutrality and transparency letting through the natural sound of recorded live music followed mostly only by people with SETs + horns or SETs or horns. And Tima