A eq or dsp should be correcting the coloration, which ur room and whats inside the room created on the sound before it reaches ur ears. A stereo in room A and in room B of different dimensions and with different furniture would never sound the same. If u like an amp or speaker in a room A , u essentially liked the amp, speaker and the room. For a purist lover, I see no point in hating a DSP which could help him acheiving what he want.
I personally enjoy the reflections sometimes, which makes it more lively spacious, 3 dimensional, to the point, where imaging is not vague. Thats the only reason why I dont use it. But, I borrowed a mini dsp for some time from a friend who kept on telling me that I dont have to live in the den, with acoustic panels to kill the reflections. I was pleasantly surprised how good it could reverse the coloration without adding distortion which I was skeptical about.
But as a stereo lover, my mind was not allowing me to believe that I am hearing a pure signal, because there is a device between my DAC and the amp, and it sounded different from the color of sound I was used to , I though what neutral was.
Bottonline, DSP or EQ is for hometheatre is just not a right arguement if we think what exactly is its purpose.
Again not hijacking this thread, it will be an overkill on a small budget amp.