That VPI integrated is BEAUTIFUL. Glad tubes are working out with your ELAC Debut 6s. I'm finding with when I put my Jolida 502P with Tung Sol KT150 tubes into my system with the ELACs. I'm finding I have to up the gain on my preamp because it can't make the Debut 6s sing as much as the Class D Red Dragon Audio M1000s. The Jolida does eek out a little more detail and sparkle out of the highs in the ELACs.