Gerry, I agree with your choice in tubes, I purchased a similar selection for my Io. In addition, I have two outboard power supplies (custom mods required from Jim White at Aesthetix). In addition to the twin power supplies, call Kevin at Upscale again, and try the Genelex KT66 tubes instead of the EL34 tubes the Io comes with. It is a religious experience. One last thing, if you solder a correct value resistor for your phono cartridge, instead of using the jumpers, there is another big improvement. I suggest the special "nude" resistors available from Walker Audio (makes the turntable). I think your particular cartridge likes 1000 Ohms, if I remember correctly. GOOD LUCK!