Nils, bravo. I too strive for constant improvement with the ultimate goal of making the system "disapear". It is a profound, long term journey and from the looks of it, you are nearing the end. During my journey, the single most incredible improvment I made was an 8 foot pair of Yamaurra, Millenium 500 speaker cables. The only way I was able to describe what these cables did for the system is that it literally "breathed life" into the music. It is these rare magical moments when all the thought, research and listening pays off. Again, well done. Your system is amazing and must have cost a few college degrees.
Keep up the good work, you are an inspiration.
Glen Passaretti