@dwolek I have a DNA-1 Deluxe in my system. I too thought it a bit harsh in the high end and contacted Steve McCormack at SMc Audio about having it modified. That was quite a few years ago and I am listening to music through it as I type this message to you. Steve will admit to you that some compromises had to be made with the stock amp to stay within a certain price point. My modified amp has not a hint of harshness. There is a richness in a true to life sense and amazing soundstage openness. And yes, the speed that originally attracted me to the DNA design is still there. Rather than purchase an entirely new amp. at least talk to Steve. You will have to invest some $ but far less than a comparable new amp.
Good luck!
Good luck!