Hey Decware enthusiast, I'm a long time lurker but definitely a Decware believer. Just received my XLR Anniversary modded Torii V a few weeks ago. Wait was better than expected, only 20 months

Been rolling the tubes and so far am partial to the sound of Tungsol 6550 new production w some 7308 Holland (thanks LON) signal tubes so far. Like them better a the 7581A power tubes. Just picked up some 1950 CBS Hytron 5U4G rectifiers to through in the mix too.
But this thread is about the BACCH-SP purifier which I've had implemented for about a year now. It is the most bang for the buck anyone could add to their system period. Easy to get up and running, very well supported and gets free updates almost monthly. I have the BACCH4MAC Audiophile +.
It's hard to describe how impactful it is on your system. It doesn't add anything to the sound, in fact it subtracts from the system bu removing cross talk from the left and right speakers. Doesn't change the tone, but does a lot at taming and focusing bass. The cost is really a no brainer, if you're considering changing your DAV or adding an amp. I have mine running with my turntable too, and its doesn't make records sound digital either.