Tgyeti,
Congratulations on your system! It seems you have found your Audio Nirvana (at least for the moment!).
As far as which component did what, I would not venture a guess (except that whatever components you replaced did not work in your system). From your description it seems the sound from your new components have created a synergistic effect. Sit back and enjoy the music!
In response to Newbee, is it possible Tgyeti's system is out of phase? Yes. Probable? No. If Merry Clayton is singing to your neighbor, the Atlanta Symphony is doing a wandering minstrel act or Gene Simmons is standing behind you licking your neck (err, scary thought!), I would have a problem. But if everything seems normal (at least to the recording engineer) and the system does what it is supposed to do, the soundstage can be as small as one person or as huge as an orchestra (or bigger!). That is just my interpretation of Tgyeti's statement. FWIW