" @blkwrxwgn I’m quite happy with it but the M3TM are known for a more relaxed vocal, maybe even rolled off highs which makes the vocals at times sound like they are farther back in the soundstage, behind the drums even and I don’t like that at all..."
With that compression driver on the back of your MT3M speakers, have you truly experimented with different "placements" of your speakers, it’s free to do? Seems to me it may be a bit more critical in your case. Just for grins, start by placing closer to the back wall and see what if anything changes good or bad to get ideas. DAC tubes as you know, and some interconnects may help too.