denon is fine for home-theatre; bose is fine for background music & entertaining. seriously.
however, sitting down & listening to music, not doing anything else, but actually *listening*, as if yude gone to a concert or club to hear live music, well, this is something totally different. while denon *does* make some hi-end audio equipment (hoover, on a-gon's classifieds, could surely set ewe up!), i'd hazard a guess that this is *not* what makes up yer home-theatre system. and, while i am not normally so blunt, to put it in your words, ya, h-t denon & bose *are* garbage for serious listening. don't take it personal, serious listening is obviously not what yure into - it's ok, not many people are... the equipment ya got prolly *is* great - for how it's being used.
ps - i hope ewe get enyoyment outta yer other hobbies, it's a shame to let nice stuff sit & not use it. cars, for example - i don't *collect* italian cars, italian cars are the only ones i own. they *all* get driven - as my commute is 45 miles each way, they get driven a *lot*... :>)