Ritteri...I'm glad that you endorse boosting 20-80 Hz by several dB, because that is what I usually do after geting the system flat. But I always felt guilty about it...like eating too much ice cream. I also use the tweeter padding resistors with my Maggies, to roll off the high end, and that gets flac also.
Organ music and bass drums do get down to the 20Hz range, no argument about that. It's just that organs and bass drums are a tiny fraction of the music I listen to. I don't do rock/pop, but I do know that it always sounds like it has a lot of bass content. However, this music is customarily presented via ProSound loudspeakers, that do not claim response below 30 Hz.
I have a CD of a German "um-pa" band with many tubas. When I find that disk I will make a point of checking for SW activity. I also have an LP of the Dukes of Dixieland which sounds as of it has a lot of bass, but to my surprise it really is not that low in frequency.