@mijostyn For sure, I have made mistakes in my purchasing. I was so ignorant when I began and never imagined that my ears would become so critical. I have browsed the mini DSP site and believe that I can add a SHD studio to my system as I already have a DAC/streamer (Lumin T2) as well as the integrated amp. Am writing them a support ticket to inquire.
So to everyone who suggested that I start to measure @erik_squires @hilde45 , I am convinced - if still reluctant. Going to order the mic to start.