OP
sounds like JBL Speakers is what you want OR Klipsch Legacy. The want for being alive and being rich / full bodied all seem to point to JBL or possibly horns specially you want it at about 50 to 55 DB. And if you want a bold sound a lower listening levels, a sub will help.
Try to lookup on Klipsch / JBL speakers. I own a Klipsch but not JBL's, but I hear them all the time in music or band stores. they seem to have that signature that you seem to be looking for. my RP600m2 has that full body sound at lower levels but that is all dependent on the settings and obviously the music being played