Avico,
I didn't want to mention this and confuse things further but I am one of those "Pre people", that is in my opinion nothing influences a stereo's sound like a preamp. I can still remember my first tubed preamp years ago, an Air Tight ATC-1, it was a revelation, the sound just opened up, becoming warmer and more detailed at the same time. I've since moved on but I will always used a tubed preamp. Perhaps you can borrow one from a friend/dealer to try in your system? You may be amazed and find the rest of your gear is suddenly satisfying.
I didn't want to mention this and confuse things further but I am one of those "Pre people", that is in my opinion nothing influences a stereo's sound like a preamp. I can still remember my first tubed preamp years ago, an Air Tight ATC-1, it was a revelation, the sound just opened up, becoming warmer and more detailed at the same time. I've since moved on but I will always used a tubed preamp. Perhaps you can borrow one from a friend/dealer to try in your system? You may be amazed and find the rest of your gear is suddenly satisfying.