Quote:

but to me the M3s sound more like live music.


That's one of the vaguest statements you can make since practically all forms of live music (except classical) are amplified in some form or another these days. Every venue sounds different. Indeed, each venue can sound different depending on who's sitting at the sound board that day. Sometimes it can be a touch harsh, sometimes liquidly warm, sometimes "perfect." In the worst cases it can give you listening fatigue after 10 minutes but you paid $40 and you like the music so dammit you're staying.