Mike, I have the VT100mkII. The problem with retubing is not so much one of expense as it is of replacing all the Sovtek driver tubes, which do not image well or have the same dynamics or subtle inner detail of premium 6DJ8s, without blowing up tubes and resisters. ARC contends you need to have Sovteks 6DJ8s in the "stand alone" position located physically at the front of the amp or it cannot be properly biased. In my opinion, this compromises the performance significntly. A couple weeks ago I posted what I believe to be a solution to this problem, along with additional information on good sources for tubes. Good luck!
