Re ATCs sounding forward or aggressive...as much as I like them (and also their rosewood cabinets) I would have never guessed British ATCs might sound hot, and thus, always assumed it was my cheapo Behringer amplifiers, not any forward or aggressive sound on part of the speakers.
The ATC's I heard were the very expensive 20's with their own internal amplification. I don't think they're much like the model you have, but can't say for sure.
As I have said in other threads, I have never really loved the midrange and/or musical sound of any system or speaker to only add that I wish they had more "inner detail" or "resolution" both of which I now - after 30 years of this - believe to be synonymous with listener's fatigue.
I think I know what you mean, but have some contrasting experience. I'm listening to a pair Grado GS1000 headphones as I write this, on a good HP amp. Tremendous inner detail and resolution, right up to my ears...yet they are not in the least fatiguing. I have heard systems that do excel in bringing out inner detail, yet are indeed fatiguing...not sure what the key is though. Interesting subject.
Particularly in this nearfield, desktop configuration, I am listening to them all day, every day, at home and at the office with music, computer sounds, streaming video, and cable TV as the input.
A. I want your job!
B. You deserve a great system.
Glad you liked the room - it is indeed a lot of fun and even my wife and her friends think it is beautiful and interesting.
I want your wife too! :-) Really, nice integration of living/working/passion. My hat's off (doesn't fit over the headphones anyway!